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215-596: Rollei ( German pronunciation: [ˈʁɔlaɪ] ) was a German manufacturer of optical instruments founded in 1920 by Paul Franke  [ de ] and Reinhold Heidecke  [ de ] in Braunschweig , Lower Saxony, and maker of the Rolleiflex and Rolleicord series of cameras. Later products included specialty and nostalgic type films for the photo hobbyist market. Originally named Werkstatt für Feinmechanik und Optik, Franke & Heidecke ,

430-483: A Vietnamese source from the same time period. The name possibly means Sea Town , being derived from the Malay tasek , meaning 'sea' or 'lake'. The Chinese traveller Wang Dayuan visited a place around 1330 named Danmaxi ( Chinese : 淡馬錫 ; pinyin : Dànmǎxí ; Wade–Giles : Tan Ma Hsi ) or Tam ma siak , depending on pronunciation; this may be a transcription of Temasek , alternatively, it may be

645-561: A hinterland , the nation rapidly developed to become one of the Four Asian Tigers . As a highly developed country , it has one of the highest GDP per capita (PPP) in the world. It is also identified as a tax haven . Singapore is the only country in Asia with a AAA sovereign credit rating from all major rating agencies . It is a major aviation , financial , and maritime shipping hub and has consistently been ranked as one of

860-524: A snap election ). The 14th and current Parliament has 103 members; 93 were directly elected from the 31 constituencies , nine are nonpartisan nominated members appointed by the president, and three are non-constituency members from opposition parties who were not elected in the last general election but appointed to the legislature to increase opposition party representation. In group representation constituencies (GRCs), political parties assemble teams of candidates to contest elections. At least one MP in

1075-558: A "ladies camera" – a Rolleiflex that used 35 mm film . This was the first Rolleiflex to come on the market that used a crank handle to advance the film, a popular feature that emerged on the 6×6 model shortly thereafter. The Rolleiflex 4×4 – known as the Babyflex outside of Germany – used 127 format film and came in two versions with either a f/3.5 and a f/2.8 Tessar lens with a focal length of 60 mm. Unfortunately, sales were disappointing, so production never resumed after

1290-536: A GRC must be of an ethnic minority background. All elections are held using first-past-the-post voting . MPs host weekly political surgeries , called " Meet-the-People Sessions ", where they help constituents resolve personal issues which can be related to housing, financial assistance, and immigration. The People's Action Party occupies a dominant position in Singaporean politics, having won large parliamentary majorities in every election since self-governance

1505-611: A Muslim state, the soldiers rebelled, killing their officers and several British civilians before the mutiny was suppressed by non-Muslim troops arriving from Johore and Burma . After World War I , the British built the large Singapore Naval Base as part of the defensive Singapore strategy . Originally announced in 1921, the construction of the base proceeded at a slow pace until the Japanese invasion of Manchuria in 1931. Costing $ 60 million and not fully completed in 1938, it

1720-430: A broad band, or extremely low reflectivity at a single wavelength. Constructive interference in thin films can create a strong reflection of light in a range of wavelengths, which can be narrow or broad depending on the design of the coating. These films are used to make dielectric mirrors , interference filters , heat reflectors , and filters for colour separation in colour television cameras. This interference effect

1935-416: A camera would make studio work more straightforward; at that time, the photographer had to stoop under a black cloth to adjust the camera, and then address the subject from this awkward position. Nevertheless, after the failure of the Babyflex , the company proceeded with caution by initially building some prototypes. One was delivered to Kahn, and the others were shipped abroad in pairs – one to be retained by

2150-486: A candidate needs to be a person at least 45 years of age who is no longer a member of a political party, to either have held public office for at least 3 years in a number of specific public service leadership roles, or to have 3 years experience as chief executive of a fully profitable private sector company with at least S$ 500 million in shareholders' equity , be a resident in Singapore for at least 10 years, not have

2365-619: A changing index of refraction; this principle allows for lenses and the focusing of light. The simplest case of refraction occurs when there is an interface between a uniform medium with index of refraction n 1 and another medium with index of refraction n 2 . In such situations, Snell's Law describes the resulting deflection of the light ray: n 1 sin ⁡ θ 1 = n 2 sin ⁡ θ 2 {\displaystyle n_{1}\sin \theta _{1}=n_{2}\sin \theta _{2}} where θ 1 and θ 2 are

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2580-578: A combination of the Malay Tanah meaning 'land' and Chinese xi meaning 'tin', which was traded on the island. Variations of the name Siṃhapura were used for a number of cities throughout the region prior to the establishment of the Kingdom of Singapura . In Hindu–Buddhist culture , lions were associated with power and protection, which may explain the attraction of such a name. The name Singapura supplanted Temasek sometime before

2795-608: A communist takeover. On 27 May 1961, Malaya's prime minister, Tunku Abdul Rahman , made a surprise proposal for a new Federation called Malaysia , which would unite the current and former British possessions in the region: the Federation of Malaya , Singapore, Brunei , North Borneo , and Sarawak . UMNO leaders believed that the additional Malay population in the Bornean territories would balance Singapore's Chinese population. The British government, for its part, believed that

3010-399: A converging lens has positive focal length, while a diverging lens has negative focal length. Smaller focal length indicates that the lens has a stronger converging or diverging effect. The focal length of a simple lens in air is given by the lensmaker's equation . Ray tracing can be used to show how images are formed by a lens. For a thin lens in air, the location of the image is given by

3225-594: A criminal record, and more. Candidates must also "satisfy" the Presidential Elections Committee (PEC) that he or she is a person of integrity, good character and reputation. From 2017, the Constitution requires that presidential elections be " reserved " for a racial community if no one from that ethnic group has been elected to the presidency in the five most recent terms. Only members of that community may qualify as candidates in

3440-459: A cut from customers. In response, amendments were made to the Women's Charter by the government in 2019 to legislate more serious punishments for traffickers, including imprisonment of up to seven years and a fine of S$ 100,000. Singapore has a highly developed market economy , based historically on extended entrepôt trade. Along with Hong Kong , South Korea , and Taiwan , Singapore is one of

3655-529: A film format that Kodak , the market leader, did not support was foolhardy. Needless to say, the quality of the engineering in the Rollei ;16 matched its high price; it had a push-pull viewfinder with automatic parallax correction up to 40 cm, whereby extending the viewfinder also wound on the film and cocked the shutter. In addition, Mutar wide-angle (0.5×) and telephoto (1.7×) conversion lenses were available as accessories. An improved successor,

3870-805: A further 700 workers. It was completed in 1938, and by the end of that year the 300,000th camera had come off the production line. In retrospect, Reinhold Heidecke regarded the Rolleiflex Automat as his favourite camera. During World War II , the company was required by the Nazis to support the war economy . As a result, Rollei was unable to develop any new models from 1940, and production of its stereo camera finally came to an end. Rollei also suffered massive losses resulting from its inability to collect monies owed by debtors from "enemy states". Furthermore, bureaucratic formalities and controls hindered exports to neutral countries. This situation, combined with

4085-526: A handful of Chinese . By 1860 the population had swelled to over 80,000, more than half being Chinese . Many of these early immigrants came to work on the pepper and gambier plantations. In 1867, the Straits Settlements were separated from British India , coming under the direct control of Britain . Later, in the 1890s, when the rubber industry became established in Malaya and Singapore,

4300-461: A local medical degree can opt to defer their draft. Though not required to perform military service, the number of women in the SAF has been increasing: since 1989 they have been allowed to fill military vocations formerly reserved for men. Before induction into a specific branch of the armed forces, recruits undergo at least nine weeks of basic military training. Because of the scarcity of open land on

4515-540: A major constituent part of several successive thalassocratic empires. Its contemporary era began in 1819, when Stamford Raffles established Singapore as an entrepôt trading post of the British Empire . In 1867, Singapore came under the direct control of Britain as part of the Straits Settlements . During World War II , Singapore was occupied by Japan in 1942 and returned to British control as

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4730-652: A mezzanine floor of MacDonald House exploded, killing three people and injuring 33 others. It was the deadliest of at least 42 bomb incidents which occurred during the confrontation. Two members of the Indonesian Marine Corps , Osman bin Haji Mohamed Ali and Harun bin Said , were eventually convicted and executed for the crime. The explosion caused US$ 250,000 (equivalent to US$ 2,417,107 in 2023) in damages to MacDonald House. Even after

4945-706: A newly independent country. After being expelled from Malaysia, Singapore became independent as the Republic of Singapore on 9 August 1965, with Lee Kuan Yew and Yusof bin Ishak as the first prime minister and president respectively. In 1967, the country co-founded the Association of Southeast Asian Nations (ASEAN). Race riots broke out once more in 1969. Lee Kuan Yew's emphasis on rapid economic growth, support for business entrepreneurship, and limitations on internal democracy shaped Singapore's policies for

5160-418: A noisy factory operating within a residential area and pressured the company to move its factory elsewhere. Accordingly, on 10 January 1923 the company purchased a 60,000 m (15 acres) plot of land on Salzdahlumer Straße, which at that time lay just beyond the city limits. Hyperinflation had devalued the currency so much that the land purchase cost practically nothing. Once the new factory had been built, much

5375-421: A picture, two separate steps were required to advance the film and cock the shutter . The Rolleiflex Automat combined the two, whereby advancing the film automatically cocked the shutter. Not only did this innovation speed up the whole process, it also eliminated accidental double exposures resulting from inadvertently forgetting to wind on the film. It also had a film-feeler mechanism that automatically started

5590-595: A reserved presidential election. In the 2017 presidential election , this combination of stringent requirements and a reserved election that required the candidate to be of the 13% Malay ethnic group led to the PEC approving a single candidate for the presidency; Halimah Yacob , considered part of the Malay community, won in an uncontested election. She also became Singapore's first female president. Members of Parliament (MPs) are elected at least every five years (or sooner with

5805-478: A result, Rollei developed the Rolleimarin , an ingenious underwater camera housing rated for depths up to 100 m. It was made from two cast metal parts. The top part contained a glass prism that was attached to the camera's focusing screen . There were also knobs on top of the housing for adjusting the exposure and aperture settings. On the bottom, left-hand side of the housing was the focusing knob, and on

6020-450: A separate Crown colony following Japan's surrender in 1945. Singapore gained self-governance in 1959 and, in 1963, became part of the new federation of Malaysia , alongside Malaya , North Borneo , and Sarawak . Ideological differences led to Singapore's expulsion from the federation two years later; Singapore became an independent sovereign country in 1965. After early years of turbulence and despite lacking natural resources and

6235-477: A single scalar quantity to represent the electric field of the light wave, rather than using a vector model with orthogonal electric and magnetic vectors. The Huygens–Fresnel equation is one such model. This was derived empirically by Fresnel in 1815, based on Huygens' hypothesis that each point on a wavefront generates a secondary spherical wavefront, which Fresnel combined with the principle of superposition of waves. The Kirchhoff diffraction equation , which

6450-522: A single point on the image, while chromatic aberration occurs because the index of refraction of the lens varies with the wavelength of the light. In physical optics, light is considered to propagate as waves. This model predicts phenomena such as interference and diffraction, which are not explained by geometric optics. The speed of light waves in air is approximately 3.0×10  m/s (exactly 299,792,458 m/s in vacuum ). The wavelength of visible light waves varies between 400 and 700 nm, but

6665-577: A single, fixed normal lens, although the Rollei Magnar tele-converter lens with 4x magnification was available as an accessory. This could be attached to the front of the primary lens while a mask (which did not magnify the image) was placed over the focusing screen. In addition, Zeiss offered two double lens converters which attached to the viewfinder filter bayonet and the primary lens bayonet. The 5-element Mutar tele-converter magnified 1.5×, weighed 327 g and could render an image accurately in

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6880-437: A spectrum. The discovery of this phenomenon when passing light through a prism is famously attributed to Isaac Newton. Some media have an index of refraction which varies gradually with position and, therefore, light rays in the medium are curved. This effect is responsible for mirages seen on hot days: a change in index of refraction air with height causes light rays to bend, creating the appearance of specular reflections in

7095-421: A strange beast on the island that he took to be a lion. Seeing this as an omen, he established the town of Singapura where he encountered the beast. The second hypothesis, drawn from Portuguese sources , postulates that this mythical story is based on the real life Parameswara of Palembang . Parameswara declared independence from Majapahit and mounted a Lion Throne. After then being driven into exile by

7310-465: A thickness of one-fourth the wavelength of incident light. The reflected wave from the top of the film and the reflected wave from the film/material interface are then exactly 180° out of phase, causing destructive interference. The waves are only exactly out of phase for one wavelength, which would typically be chosen to be near the centre of the visible spectrum, around 550 nm. More complex designs using multiple layers can achieve low reflectivity over

7525-502: A variety of models. The company expanded its production facilities and product range at the end of the 1960s beyond what a small company like Rollei could manage. Rollei's decision to start manufacturing in Singapore in 1970 was regarded as a pioneering achievement by the photographic industry. Unfortunately, it also damaged the companies reputation as a German precision manufacturer. In 1982, after many failed attempts at restructuring ,

7740-476: A variety of technologies and everyday objects, including mirrors , lenses , telescopes , microscopes , lasers , and fibre optics . Optics began with the development of lenses by the ancient Egyptians and Mesopotamians . The earliest known lenses, made from polished crystal , often quartz , date from as early as 2000 BC from Crete (Archaeological Museum of Heraclion, Greece). Lenses from Rhodes date around 700 BC, as do Assyrian lenses such as

7955-523: A wide margin. Even though it was quite an expensive product, orders for 800 cameras were received in the first month alone. A Rolleiflex fitted with a f/4.5 lens cost 198  ℛ︁ℳ︁ , with a f/3.8 lens it cost 225 ℛ︁ℳ︁. This success made it possible to obtain credit to buy a new factory and thrive in the midst of the Great Depression . In the old factory, a further 23,720 cameras were produced up until 1932. In 1930,

8170-525: A wide range of scientific topics, and discussed light from four different perspectives: an epistemology of light, a metaphysics or cosmogony of light, an etiology or physics of light, and a theology of light, basing it on the works of Aristotle and Platonism. Grosseteste's most famous disciple, Roger Bacon , wrote works citing a wide range of recently translated optical and philosophical works, including those of Alhazen, Aristotle, Avicenna , Averroes , Euclid, al-Kindi, Ptolemy, Tideus, and Constantine

8385-663: A year, Franke and Heidecke had taken over the entire building. By 1922, business was so good that they were able to take out a loan to purchase the property outright. To get the company going, Franke and Heidecke decided to manufacture a stereo camera in the short term. Cameras of this type were popular, and Reinhold Heidecke was very familiar with them. As they were also in Voigtländer's product range, however, Franke and Heidecke did not want to look as if they were simply copying theirs. They purchased several Voigtländer units, and from what they learned by dismantling these, constructed

8600-427: Is a simple paraxial physical optics model for the propagation of coherent radiation such as laser beams. This technique partially accounts for diffraction, allowing accurate calculations of the rate at which a laser beam expands with distance, and the minimum size to which the beam can be focused. Gaussian beam propagation thus bridges the gap between geometric and physical optics. In the absence of nonlinear effects,

8815-855: Is also a founding member of The Forum of Small States (FOSS) , a voluntary and informal grouping at the UN. Singapore maintains membership in other regional organisations, such as Asia–Europe Meeting , the Forum for East Asia-Latin American Cooperation , the Indian Ocean Rim Association , and the East Asia Summit . It is also a member of the Non-Aligned Movement, the United Nations and

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9030-835: Is also a member of the United Nations , the World Trade Organization , the East Asia Summit , the Non-Aligned Movement , and the Commonwealth of Nations . The English name of "Singapore" is an anglicisation of the native Malay name for the country, Singapura ( pronounced [siŋapura] ), which was in turn derived from the Sanskrit word for 'lion city' ( Sanskrit : सिंहपुर ; romanised: Siṃhapura ; Brahmi : 𑀲𑀺𑀁𑀳𑀧𑀼𑀭 ; literally "lion city"; siṃha means 'lion', pura means 'city' or 'fortress'). Pulau Ujong

9245-517: Is also what causes the colourful rainbow patterns seen in oil slicks. Singapore Singapore , officially the Republic of Singapore , is an island country and city-state in Southeast Asia . The country's territory comprises one main island , 63 satellite islands and islets , and one outlying islet . It is about one degree of latitude (137 kilometres or 85 miles) north of

9460-486: Is considered to travel in straight lines, while in physical optics, light is considered as an electromagnetic wave. Geometrical optics can be viewed as an approximation of physical optics that applies when the wavelength of the light used is much smaller than the size of the optical elements in the system being modelled. Geometrical optics , or ray optics , describes the propagation of light in terms of "rays" which travel in straight lines, and whose paths are governed by

9675-491: Is derived using Maxwell's equations, puts the Huygens-Fresnel equation on a firmer physical foundation. Examples of the application of Huygens–Fresnel principle can be found in the articles on diffraction and Fraunhofer diffraction . More rigorous models, involving the modelling of both electric and magnetic fields of the light wave, are required when dealing with materials whose electric and magnetic properties affect

9890-598: Is enshrined in the constitution and continues to shape national policies in education, housing, and politics. Singapore is a parliamentary republic in the Westminster tradition of unicameral parliamentary government, and its legal system is based on common law . While the country is de jure a multi-party democracy with free elections , the government under the People's Action Party (PAP) wields widespread control and political dominance . The PAP has governed

10105-640: Is maintaining security in Southeast Asia and surrounding territories. An underlying principle is political and economic stability in the region. It has diplomatic relations with more than 180 sovereign states. As one of the five founding members of ASEAN , Singapore is a strong supporter of the ASEAN Free Trade Area (AFTA) and the ASEAN Investment Area (AIA); it is also the host of the APEC Secretariat. Singapore

10320-704: Is regarded as a key factor behind Singapore's political stability, economic growth, and harmonious social order. In 2021, the World Justice Project 's Rule of Law Index ranked Singapore as 17th overall among the world's 193 countries for adherence to the rule of law . Singapore ranked high on the factors of order and security (#3), absence of corruption (#3), regulatory enforcement (#4), civil justice (#8), and criminal justice (#7), and ranked significantly lower on factors of open government (#34), constraints on government powers (#32), and fundamental rights (#38). Singapore's stated foreign policy priority

10535-464: Is the right policy and that there is "clear evidence" of serious deterrence , and that the law should be looked at upon in the wider context of "saving lives", particularly citizens. In 2004, Amnesty International claimed that some legal provisions of the Singapore system for the death penalty conflict with "the right to be presumed innocent until proven guilty". The government has disputed Amnesty's claims, stating that their "position on abolition of

10750-409: Is to the lens, the further the image is from the lens. With diverging lenses, incoming parallel rays diverge after going through the lens, in such a way that they seem to have originated at a spot one focal length in front of the lens. This is the lens's front focal point. Rays from an object at a finite distance are associated with a virtual image that is closer to the lens than the focal point, and on

10965-406: Is usually done using simplified models. The most common of these, geometric optics , treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be accounted for in geometric optics. Historically,

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11180-480: The Book of Optics ( Kitab al-manazir ) in which he explored reflection and refraction and proposed a new system for explaining vision and light based on observation and experiment. He rejected the "emission theory" of Ptolemaic optics with its rays being emitted by the eye, and instead put forward the idea that light reflected in all directions in straight lines from all points of the objects being viewed and then entered

11395-475: The Mamiya C-Series from Japan appeared in 1956. Mamiya initially offered three sets of interchangeable double lenses for it: normal, telephoto and wide-angle. Later on, additional double lenses with focal lengths of 55 mm and 250 mm were introduced; one even had a dimmable viewfinder lens, which enabled depth of field adjustment through the viewfinder. By comparison, the Rolleiflex only had

11610-598: The 1964 race riots . On 7 August 1965, Malaysian prime minister Tunku Abdul Rahman, seeing no alternative to avoid further bloodshed (and with the help of secret negotiations by PAP leaders, as revealed in 2015) advised the Parliament of Malaysia that it should vote to expel Singapore from Malaysia. On 9 August 1965, the Malaysian Parliament voted 126 to 0 to move a bill to amend the constitution, expelling Singapore from Malaysia, which left Singapore as

11825-564: The 2004 Indian Ocean earthquake and tsunami . Since 2009, the Republic of Singapore Navy (RSN) has deployed ships to the Gulf of Aden to aid in countering piracy efforts as part of Task Force 151 . The SAF also helped in relief efforts during Hurricane Katrina , and Typhoon Haiyan . Singapore is part of the Five Power Defence Arrangements (FPDA), a military alliance with Australia, Malaysia, New Zealand, and

12040-679: The Commonwealth . While Singapore is not a formal member of the G20 , it has been invited to participate in G20 processes in most years since 2010. Singapore is also the location of the Pacific Economic Cooperation Council (PECC) Secretariat. In general, bilateral relations with other ASEAN members are strong; however, disagreements have arisen, and relations with neighbouring Malaysia and Indonesia have sometimes been strained. Malaysia and Singapore have clashed over

12255-560: The DHW Fototechnik GmbH —a company founded by Rolf Daus, Hans Hartje and Frank Will, former Franke & Heidecke employees. DHW Fototechnik presented two new Rolleiflex cameras and a new electronic shutter at photokina 2012 . DHW itself filed for insolvency on 15 August 2014 and was dissolved in April 2015, thereby temporarily ending any further production of cameras, lenses and accessories. A new, smaller company called DW Photo

12470-495: The Digital and Intelligence Service . It is seen as the guarantor of the country's independence, translating into Singapore culture, involving all citizens in the country's defence. The government spent 2.7% of the country's GDP on the military in 2024, the highest in the region. After its independence, Singapore had only two infantry regiments commanded by British officers. Considered too small to provide effective security for

12685-493: The Javanese , he usurped control over Temasek . He may have rechristened the area as Singapura , recalling the throne he had been driven from. Under Japanese occupation , Singapore was renamed Syonan-to ( Japanese : 昭 南 , Hepburn : Shōnan ) , meaning 'light of the south'. Singapore is sometimes referred to by the nickname the "Garden City", in reference to its parks and tree-lined streets. Another informal name,

12900-464: The MATADOR anti-tank weapon. The SAF is being developed to respond to a wide range of issues in both conventional and unconventional warfare. The Defence Science and Technology Agency (DSTA) is responsible for procuring resources for the military. The geographic restrictions of Singapore mean that the SAF must plan to fully repulse an attack, as they cannot fall back and re-group. The small size of

13115-579: The Magic II , cost 498 DM and also featured manual exposure control. Some accessories manufactured for Rollei TLRs: By the end of 1950s, the market for twin-lens medium format cameras had gradually become saturated. More and more amateur photographers and photojournalists were using 35 mm format cameras, while studio photographers preferred single-lens medium format cameras. Although they were more expensive, single-lens cameras offered film holders , which could quickly be swapped (an assistant loaded

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13330-617: The Nimrud lens . The ancient Romans and Greeks filled glass spheres with water to make lenses. These practical developments were followed by the development of theories of light and vision by ancient Greek and Indian philosophers, and the development of geometrical optics in the Greco-Roman world . The word optics comes from the ancient Greek word ὀπτική , optikē ' appearance, look ' . Greek philosophy on optics broke down into two opposing theories on how vision worked,

13545-747: The Republic of Singapore Air Force (RSAF) maintains a number of overseas bases in Australia , the United States , and France . The RSAF's 130 Squadron is based in RAAF Base Pearce , Western Australia , and its 126 Squadron is based in the Oakey Army Aviation Centre , Queensland . The RSAF has one squadron—the 150 Squadron—based in Cazaux Air Base in southern France. The RSAF's overseas detachments in

13760-511: The Rollei 16S , was released in 1965. To help return the company to profitability, Rollei's management sought advice from a number of experts. One of them, Heinrich Peesel , a physicist from Hamburg, produced a concise, 5-page report that so impressed Rollei management that they offered him the chairmanship of the board, thereby accepting that far-reaching changes were necessary. Peesel, then 38 years old, thus succeeded Horst Franke as chairman of

13975-590: The Soviet occupation zone . Franke & Heidecke started over with 72 workers, and by Christmas 1945 the workforce had grown to 172 employees. Everything the company made in 1945 was delivered to the British Ministry of Defence . The difficult supply situation forced Rollei into using lenses from the West German manufacturer Schneider as well. However, this was not a problem as Schneider's quality control

14190-540: The Speakers' Corner . In the Corruption Perceptions Index , which ranks countries by "perceived levels of public sector corruption", Singapore has consistently ranked as one of the least corrupt countries in the world, in spite of being illiberal. Singapore's unique combination of a strong, soft authoritarian government with an emphasis on meritocracy is known as the "Singapore model", and

14405-760: The Stereo Heidoscop . It included two Carl Zeiss Tessar lenses (f/4.5, 55 mm) and, mounted between them, a Carl Zeiss Super Triplet (f/3.2) viewfinder. At that time, Tessar lenses were widely regarded as the best available; they were often used in the United States, even though locally produced alternatives were available. Zeiss had an excellent reputation world-wide, which Franke & Heidecke leveraged for their own products. More importantly, they differentiated themselves from cheaper alternatives. The camera projected an image onto glass plates of dimensions 45 mm × 107 mm. The name Heidoscop

14620-453: The Strait of Malacca has been a cause of concern for all three countries. Close economic ties exist with Brunei , and the two share a pegged currency value, through a Currency Interchangeability Agreement between the two countries which makes both Brunei dollar and Singapore dollar banknotes and coins legal tender in either country. The first diplomatic contact with China was made in

14835-454: The emission theory , the idea that visual perception is accomplished by rays emitted by the eyes. He also commented on the parity reversal of mirrors in Timaeus . Some hundred years later, Euclid (4th–3rd century BC) wrote a treatise entitled Optics where he linked vision to geometry , creating geometrical optics . He based his work on Plato's emission theory wherein he described

15050-919: The equator , off the southern tip of the Malay Peninsula , bordering the Strait of Malacca to the west, the Singapore Strait to the south along with the Riau Islands in Indonesia , the South China Sea to the east, and the Straits of Johor along with the State of Johor in Malaysia to the north. Singapore's history dates back at least eight hundred years, having been a maritime emporium known as Temasek and subsequently

15265-468: The intromission theory and the emission theory . The intromission approach saw vision as coming from objects casting off copies of themselves (called eidola) that were captured by the eye. With many propagators including Democritus , Epicurus , Aristotle and their followers, this theory seems to have some contact with modern theories of what vision really is, but it remained only speculation lacking any experimental foundation. Plato first articulated

15480-439: The most expensive cities to live in for expatriates and foreign workers . Singapore ranks highly in key social indicators: education , healthcare , quality of life , personal safety , infrastructure , and housing , with a home-ownership rate of 88 percent. Singaporeans enjoy one of the longest life expectancies , fastest Internet connection speeds , lowest infant mortality rates , and lowest levels of corruption in

15695-448: The superposition principle , which is a wave-like property not predicted by Newton's corpuscle theory. This work led to a theory of diffraction for light and opened an entire area of study in physical optics. Wave optics was successfully unified with electromagnetic theory by James Clerk Maxwell in the 1860s. The next development in optical theory came in 1899 when Max Planck correctly modelled blackbody radiation by assuming that

15910-466: The surface normal , a line perpendicular to the surface at the point where the ray hits. The incident and reflected rays and the normal lie in a single plane, and the angle between the reflected ray and the surface normal is the same as that between the incident ray and the normal. This is known as the Law of Reflection . For flat mirrors , the law of reflection implies that images of objects are upright and

16125-597: The " Little Red Dot ", was adopted after an article in the Asian Wall Street Journal of 4 August 1998 said that Indonesian President B. J. Habibie referred to Singapore as a red dot on a map. In 1299, according to the Malay Annals , the Kingdom of Singapura was founded on the island by Sang Nila Utama . Although the historicity of the accounts as given in the Malay Annals is

16340-439: The "benevolent" yet "highly authoritarian" colonial system of governance inherited from Britain rather than forging a full democracy. A conservative ideology of " Asian values " evolved to replace British rule, based on "communal loyalty, distrust of government, and avoidance of individual or collective responsibility for wider public interests", with less regard for human rights in the nascent Western sense. The fact that "neither

16555-422: The 15th century, after the establishment of the Kingdom of Singapura on the island by a fleeing Sumatran Raja (prince) from Palembang . However, the precise time and reason for the name change is unknown. The semi-historical Malay Annals state that Temasek was christened Singapura by Sang Nila Utama , a 13th-century Sumatran Raja from Palembang . The Annals state that Sang Nila Utama encountered

16770-584: The 1970s, with full diplomatic relations established in the 1990s. China has been Singapore's largest trading partner since 2013, after surpassing Malaysia. Singapore and the United States share a long-standing close relationship, in particular in defence, the economy, health, and education. Singapore has also increased co-operation with ASEAN members and China to strengthen regional security and fight terrorism, and participated in ASEAN's first joint maritime exercise with China in 2018. It has also given support to

16985-468: The 9 cm × 9 cm film format. Kahn explained as a pretext, that his customers liked to keep the negatives because they had doubts about the durability of prints. Moreover, roll film was much easier to archive than glass plates. In fact, Kahn had concealed the real rationale behind his request because Franke & Heidecke supported the Nazi Party in order to get the workers they needed. Fearing

17200-567: The African . Bacon was able to use parts of glass spheres as magnifying glasses to demonstrate that light reflects from objects rather than being released from them. The first wearable eyeglasses were invented in Italy around 1286. This was the start of the optical industry of grinding and polishing lenses for these "spectacles", first in Venice and Florence in the thirteenth century, and later in

17415-632: The East", and military discussions often referred to the base as simply " East of Suez ". However, the British Home Fleet was stationed in Europe, and the British could not afford to build a second fleet to protect their interests in Asia. The plan was for the Home Fleet to sail quickly to Singapore in the event of an emergency. As a consequence, after World War II broke out in 1939, the fleet

17630-548: The Huygens–Fresnel principle states that every point of a wavefront is associated with the production of a new disturbance, it is possible for a wavefront to interfere with itself constructively or destructively at different locations producing bright and dark fringes in regular and predictable patterns. Interferometry is the science of measuring these patterns, usually as a means of making precise determinations of distances or angular resolutions . The Michelson interferometer

17845-527: The Japanese changed its image in the eyes of Singaporeans. British Military Administration ended on 1 April 1946, and Singapore became a separate Crown Colony . In July 1947, separate Executive and Legislative Councils were established and the election of six members of the Legislative Council was scheduled for the following year. During the 1950s, Chinese communists , with strong ties to

18060-522: The PAP drop to 61% of the vote, while the Workers' Party took 10 of the 93 seats, the highest number ever won by another party. On 15 May 2024, Lawrence Wong became Singapore's fourth Prime Minister; he is the first prime minister born after independence. Singapore is a parliamentary republic based on the Westminster system . The Constitution of Singapore is the supreme law of the country, establishing

18275-567: The People's Action Party has led to Singapore being described by academics as an illiberal democracy , or a soft-authoritarian state in which the PAP faces little to no feasible political competition to its rule of the country. The multi-party democratic process of Singapore has been described as "minimal" in comparison to the state's focus on economic development and social order. According to Gordon P. Means, professor emeritus of political science at McMaster University , Singapore reinvented

18490-724: The Singapore Government to create the Singapore Armed Forces (SAF) from scratch, and Israeli instructors were brought in to train Singaporean soldiers. Military courses were conducted according to the IDF's format, and Singapore adopted a system of conscription and reserve service based on the Israeli model . Singapore still maintains strong security ties with Israel and is one of the biggest buyers of Israeli arms and weapons systems, with one recent example being

18705-471: The Temenggong's help, Raffles managed to smuggle Tengku Long back into Singapore. Raffles offered to recognise Tengku Long as the rightful Sultan of Johor, under the title of Sultan Hussein , as well as provide him with a yearly payment of $ 5000 and another $ 3000 to the Temenggong; in return, Sultan Hussein would grant the British the right to establish a trading post on Singapore. The Treaty of Singapore

18920-550: The US-led coalition to fight terrorism, with bilateral co-operation in counter-terrorism and counter-proliferation initiatives, and joint military exercises. As Singapore has diplomatic relations with both the United States and North Korea , and was one of the few countries that have relationships with both countries, in June 2018, it hosted a historic summit between US President Donald Trump and North Korean leader Kim Jong-un ,

19135-632: The United Kingdom. According to the 2024 Global Peace Index , Singapore is the 5th most peaceful country in the world. Capital punishment is a legal and enforced penalty in Singapore. The country is one of four in the developed world to retain the death penalty, along with the United States , Japan and Taiwan . Particularly, its use against drug trafficking has been a source of contention with non-governmental organisations such as Amnesty International and Human Rights Watch . The government has responded that it has "no doubts" that it

19350-773: The United States are: Luke Air Force Base in Arizona , Marana in Arizona, Mountain Home Air Force Base in Idaho , and Andersen Air Force Base in Guam . The SAF has sent forces to assist in operations outside the country, in areas such as Iraq , and Afghanistan , in both military and civilian roles. In the region, they have helped to stabilise East Timor and have provided aid to Aceh in Indonesia following

19565-484: The amplitude of the wave, which for light is associated with a brightening of the waveform in that location. Alternatively, if the two waves of the same wavelength and frequency are out of phase, then the wave crests will align with wave troughs and vice versa. This results in destructive interference and a decrease in the amplitude of the wave, which for light is associated with a dimming of the waveform at that location. See below for an illustration of this effect. Since

19780-552: The angle of incidence. Plutarch (1st–2nd century AD) described multiple reflections on spherical mirrors and discussed the creation of magnified and reduced images, both real and imaginary, including the case of chirality of the images. During the Middle Ages , Greek ideas about optics were resurrected and extended by writers in the Muslim world . One of the earliest of these was Al-Kindi ( c.  801 –873) who wrote on

19995-435: The angles between the normal (to the interface) and the incident and refracted waves, respectively. The index of refraction of a medium is related to the speed, v , of light in that medium by n = c / v , {\displaystyle n=c/v,} where c is the speed of light in vacuum . Snell's Law can be used to predict the deflection of light rays as they pass through linear media as long as

20210-522: The board on 1 January 1964. He promptly set Rollei onto an extremely risky course, which, despite some early successes, ultimately ended in a complete fiasco. His basic philosophy was to explore all possible avenues in photography rather than concentrate on a single product line. Optical Most optical phenomena can be accounted for by using the classical electromagnetic description of light, however complete electromagnetic descriptions of light are often difficult to apply in practice. Practical optics

20425-558: The brands "Rollei" and "Rolleiflex" continue to be owned by the RCP Technik Verwaltungs GmbH . On 1 January 2015, the RCP-Technik GmbH & Co. KG refirmed as Rollei GmbH & Co. KG to market digital consumer cameras and accessories under the "Rollei" label in Europe. Rollei was a German company that established a worldwide reputation with the Rolleiflex , a twin-lens reflex camera . Rollei

20640-481: The bulk of the companies resources, some regular product development was still possible, and work on tempered glass lenses as well as flash synchronization continued, albeit on a small scale. The cameras were used inter alia in military reconnaissance . As Braunschweig was one of the centres of the German armaments industry , it was subjected to frequent, sometimes heavy aerial bombardment , which seriously damaged

20855-410: The camera, both made of aluminium, had to be handled with care, which remained the case until the camera went into production. One more prototype was produced in 1928, and then the big moment finally arrived: on 10 August, the first camera went into series production. Altogether, 14 units were made that year. Then, at 11am on Monday, 11 December, selected journalists were invited to a press conference in

21070-497: The challenge from Mamiya, Rollei created a camera comparable to the C Series and gave it to photojournalists to test. Although they were enthusiastic, Rollei did not believe – much to the astonishment of industry experts – that it could manufacture removable lenses with the required precision. Instead, as a compromise, the company introduced in 1959 the Tele-Rolleiflex with a Zeiss Sonnar f/4, 135 mm lens. This camera

21285-474: The city. On 1 and 15 January 1944, and again on 13 August, Rollei too suffered air raid damage to its factories. By the time the war ended on 12 April 1945, almost 65% of its plant and machinery had been destroyed. After the war, Braunschweig ended up in the British occupation zone . The allied occupying forces wanted Rollei to survive as a company, even helping it procure lenses from Zeiss, which had ended up in

21500-441: The collapse in overseas trade, forced Paul Franke to reduce the workforce to 600 people. Alongside its renowned cameras, Rollei – like its neighbour Voigtländer – was now engaged in the manufacture of equipment deemed important to the German war effort: precision optics for binoculars , periscopes , telescopic sights (for sniper rifles , for example), and theodolites for directing artillery . Although these products consumed

21715-715: The company finally achieved success by focusing on medium format cameras along with a few other products. Surveying systems were added to the product range in 1986, and modern digital and compact cameras were included from 1991. Over the years, many great photographers have used Rollei cameras: David Bailey and Diane Arbus (Rolleiflex 3.5F TLR with 75 mm f/3.5 Planar), Brett Weston (Rolleiflex SL66 and SL66E SLR), and Helmut Newton (Rolleiflex 2.8GX), amongst others. Rollei cameras typically used Carl Zeiss or Schneider Kreuznach lenses, as well as lenses manufactured by Rollei based on designs by Zeiss, and occasionally lenses made by Japanese manufacturers. While Reinhold Heidecke

21930-631: The company headquarters moved to Berlin and the company was split into two different companies: Rollei GmbH in Berlin, owner of the Rollei brand and selling various OEM equipment, and Rollei Produktion GmbH in Braunschweig, an equipment factory which became Franke & Heidecke GmbH, Feinmechanik und Optik . Following another restructuring in 2007, Rollei was split into three companies. Franke & Heidecke GmbH, Feinmechanik und Optik focused on

22145-467: The company moved into the new factory on Salzdahlumer Straße. It comprised two floors with a total area of 2,000 square metres ( 1 ⁄ 2 acre), sufficient space to manufacture 20,000 cameras annually. Although the site was well served by public transport, it lay some distance from the city centre, so the company built a canteen and shop for its workforce, which now numbered 309 employees. Wilhelmine Heidecke, Reinhold Heidecke's wife, suggested building

22360-525: The company renamed into Rollei-Werke Franke & Heidecke GmbH in 1972, Rollei-Werke Franke & Heidecke GmbH & Co. KG , in 1979, and Rollei Fototechnic GmbH & Co. KG in 1981. After being purchased in 1995 by Samsung Techwin , part of the South Korean Samsung Group , it was sold back to its internal management in 1999. In 2002, it was bought by a Danish investment group, and renamed Rollei GmbH in 2004. In 2005/2006,

22575-439: The consequences of leasing to a Jew, the owner of his studio had already shut off his water supply. This meant that Kahn had to develop his negatives at home, whereby roll film was easier to transport than plates. A roll film camera would also facilitate house calls. Having built a small Rolleiflex , the obvious next step was to make a larger version. Indeed, the slogan "you see what you get" had already been envisaged for it. Such

22790-571: The counter, so no red window was needed. The Rolleiflex Automat won the Grand Prix award at the Paris World's Fair in 1937, which generated a lot of interest. The company founders we so taken with their new creation that they immediately commissioned the construction of a second factory. The new factory, comprising three floors with a combined production area of 3,000 square metres ( 3 ⁄ 4 acre), provided sufficient space to house

23005-612: The country continuously since full internal self-government was achieved in 1959, and holds a supermajority in Parliament . One of the five founding members of ASEAN , Singapore is also the headquarters of the Asia-Pacific Economic Cooperation Secretariat, the Pacific Economic Cooperation Council Secretariat, and is the host city of many international conferences and events . Singapore

23220-615: The country's third prime minister. Lee Hsien Loong's tenure included the 2007–2008 financial crisis , the resolution of a dispute over land ownership at Tanjong Pagar railway station between Singapore and Malaysia, the introduction of the two integrated resorts (IRs), located at the Marina Bay Sands and Resorts World Sentosa , and the COVID-19 pandemic . The PAP suffered its worst ever electoral results in 2011, winning just 60% of votes, amidst debate over issues including

23435-750: The death penalty is by no means uncontested internationally" and that the report contains "grave errors of facts and misrepresentations". From 1938 to 2023, sexual relations between men were technically illegal under Section 377A of the Penal Code , first introduced during British colonial rule. During the last few decades, this law was mostly unenforced and pressure to repeal it increased as homosexuality became more accepted by Singaporean society. Meanwhile, sexual relations between women had always been legal. In 2022, Prime Minister Lee Hsien Loong announced that Singapore would repeal 377A, effectively decriminalising homosexual behaviour. Nevertheless, he added that

23650-530: The delivery of fresh water to Singapore, and access by the Singapore Armed Forces to Malaysian airspace. Border issues exist with Malaysia and Indonesia, and both have banned the sale of marine sand to Singapore over disputes about Singapore's land reclamation. Some previous disputes, such as the Pedra Branca dispute , have been resolved by the International Court of Justice . Piracy in

23865-463: The development costs any more. One of his projects was the Magic , which required several expensive machine tools to be built – expenditure that could not be justified relative to the small number that were produced. In contrast, Agfa preferred the opposite approach, of always developing as many models as possible from an existing camera housing. The Magic , although intended for amateur photographers,

24080-449: The distance (as if on the surface of a pool of water). Optical materials with varying indexes of refraction are called gradient-index (GRIN) materials. Such materials are used to make gradient-index optics . For light rays travelling from a material with a high index of refraction to a material with a low index of refraction, Snell's law predicts that there is no θ 2 when θ 1 is large. In this case, no transmission occurs; all

24295-594: The end of the 14th century, its ruler Parameswara was attacked by either the Majapahit or the Siamese, forcing him to move to Malacca where he founded the Sultanate of Malacca . Archaeological evidence suggests that the main settlement on Fort Canning Hill was abandoned around this time, although a small trading settlement continued in Singapore for some time afterwards. In 1613, Portuguese raiders burned down

24510-544: The end, Horst Franke relinquished his position as general manager. In 1960, Rollei introduced its first slide projector , the P11 . It included two slide trays: the left-hand tray was for 35 mm (5 cm×5 cm) slides, the right-hand tray was for medium format (7 cm×7 cm) slides. The Rollei Universal Projector sold for 398.60 DM, plus 97.50 DM for a standard lens. The P11 remained in production until 1978; many more projectors were subsequently added to

24725-426: The exchange of energy between light and matter only occurred in discrete amounts he called quanta . In 1905, Albert Einstein published the theory of the photoelectric effect that firmly established the quantization of light itself. In 1913, Niels Bohr showed that atoms could only emit discrete amounts of energy, thus explaining the discrete lines seen in emission and absorption spectra . The understanding of

24940-533: The eye, although he was unable to correctly explain how the eye captured the rays. Alhazen's work was largely ignored in the Arabic world but it was anonymously translated into Latin around 1200 A.D. and further summarised and expanded on by the Polish monk Witelo making it a standard text on optics in Europe for the next 400 years. In the 13th century in medieval Europe, English bishop Robert Grosseteste wrote on

25155-443: The festively decorated production area. Paul Franke put together press packs for the occasion, which led one magazine to publish a test report without ever actually handling the camera. Although Franke had forgotten to prepare sample photographs to distribute to the press, he neatly avoided this oversight by distributing empty, labelled cartons around the building, just for show. Demand for the new camera exceeded production capacity by

25370-535: The feud between the two lasted until Hooke's death. In 1704, Newton published Opticks and, at the time, partly because of his success in other areas of physics, he was generally considered to be the victor in the debate over the nature of light. Newtonian optics was generally accepted until the early 19th century when Thomas Young and Augustin-Jean Fresnel conducted experiments on the interference of light that firmly established light's wave nature. Young's famous double slit experiment showed that light followed

25585-457: The fighting for Singapore were heavy, with a total of nearly 85,000 personnel captured. About 5,000 were killed or wounded, of which Australians made up the majority. Japanese casualties during the fighting in Singapore amounted to 1,714 killed and 3,378 wounded. The occupation was to become a major turning point in the histories of several nations, including those of Japan , Britain , and Singapore. Japanese newspapers triumphantly declared

25800-412: The film simply required inserting the leader into the appropriate slot in the camera. Since there was no take-up spool, the film coiled up loosely on itself. Without a doubt, limited film choice and availability adversely affected camera sales, consequently only 25,000 units were produced. As Rollei also spent a lot on advertising, this camera did little to alleviate its dire financial situation. Reliance on

26015-460: The film), as well as interchangeable lenses. Hasselblad was the market leader in this segment. The Swedish company introduced their first camera, the Hasselblad 1600F , in 1948. However, this model was regarded as being technically inferior because its shutter was unreliable. To solve this problem, the 1000F was released in 1952 with a reduced shutter speed range, but the focal-plane shutter

26230-800: The first-ever meeting between the sitting leaders of the two nations. It also hosted the Ma–Xi meeting in 2015, the first meeting between the political leaders of the two sides of the Taiwan Strait since the end of the Chinese Civil War in 1950. The Singaporean military, arguably the most technologically advanced in Southeast Asia, consists of the Army , the Navy , the Air Force and

26445-414: The flexibility required to adapt to changing circumstances; for example, he failed to reduce the workforce in difficult times, whereas Paul Franke had done so immediately at the onset of the war. To begin with, Rollei had no real competition, which yielded ever increasing sales of its cameras. In the 1950s, almost every press photographer owned a Rolleiflex , and quite a few amateurs did as well. The camera

26660-474: The focus to be smeared out in space. In particular, spherical mirrors exhibit spherical aberration . Curved mirrors can form images with a magnification greater than or less than one, and the magnification can be negative, indicating that the image is inverted. An upright image formed by reflection in a mirror is always virtual, while an inverted image is real and can be projected onto a screen. Refraction occurs when light travels through an area of space that has

26875-555: The formal surrender of Japanese forces in the region from General Seishirō Itagaki on behalf of General Hisaichi Terauchi on 12 September 1945. Meanwhile, Tomoyuki Yamashita was tried by a US military commission for war crimes, but not for crimes committed by his troops in Malaya or Singapore. He was convicted and hanged in the Philippines on 23 February 1946. Much of the infrastructure in Singapore had been destroyed during

27090-411: The gloss of surfaces such as mirrors, which reflect light in a simple, predictable way. This allows for the production of reflected images that can be associated with an actual ( real ) or extrapolated ( virtual ) location in space. Diffuse reflection describes non-glossy materials, such as paper or rock. The reflections from these surfaces can only be described statistically, with the exact distribution of

27305-410: The headquarters of Rollei GmbH were moved to Berlin while production was transferred to Rollei Produktion GmbH , currently Franke & Heidecke GmbH , in Braunschweig. The company underwent more radical restructuring in 2007/2008. The frequent name-changes are an indication of a turbulent history: After the popularity of the twin lens reflex cameras declined, the Rolleiflex was supplemented with

27520-409: The imaging lens and surrounding the opening for the optical path was a large cogwheel which drove four smaller cogs located top left and right, and bottom left and right. Each of the four small cogs drove rack and pinions (toothed rails) attached to the lens assembly. This system functioned perfectly, and, thanks to high-quality components, also for many years of service. Only the viewfinder and back of

27735-535: The importer as a demonstration unit, the other to be delivered to a reputable studio. The project was eventually abandoned after Salomon Kahn was arrested and nobody else showed any interest in the studio camera. Of the 14 prototypes that were built, one still exists: it currently belongs to the Municipal Museum of Braunschweig. In 1933, the Rolleicord , a cheaper version of the Rolleiflex , came onto

27950-416: The incident rays came. This is called retroreflection . Mirrors with curved surfaces can be modelled by ray tracing and using the law of reflection at each point on the surface. For mirrors with parabolic surfaces , parallel rays incident on the mirror produce reflected rays that converge at a common focus . Other curved surfaces may also focus light, but with aberrations due to the diverging shape causing

28165-418: The indexes of refraction and the geometry of the media are known. For example, the propagation of light through a prism results in the light ray being deflected depending on the shape and orientation of the prism. In most materials, the index of refraction varies with the frequency of the light, known as dispersion . Taking this into account, Snell's Law can be used to predict how a prism will disperse light into

28380-596: The influx of foreign workers and the high cost of living. On 23 March 2015, Lee Kuan Yew died , and a one-week period of public mourning was observed nationwide. Subsequently, the PAP regained its dominance in Parliament through the September general election , receiving 69.9% of the popular vote, although this remained lower than the 2001 tally of 75.3% and the 1968 tally of 86.7%. The 2020 election held in July saw

28595-441: The insistence of his wife, he presented his concept to Paul Franke  [ de ] , a salesman and former colleague at Voigtländer. Franke was so enthusiastic he put up 75,000 M of his own money and went looking for more capital. After he secured additional funding of 200,000 M, they resolved to go into business together. In November 1919, they filed an application to register the company "Franke & Heidecke", which

28810-436: The interaction between light and matter that followed from these developments not only formed the basis of quantum optics but also was crucial for the development of quantum mechanics as a whole. The ultimate culmination, the theory of quantum electrodynamics , explains all optics and electromagnetic processes in general as the result of the exchange of real and virtual photons. Quantum optics gained practical importance with

29025-426: The interaction of light with the material. For instance, the behaviour of a light wave interacting with a metal surface is quite different from what happens when it interacts with a dielectric material. A vector model must also be used to model polarised light. Numerical modeling techniques such as the finite element method , the boundary element method and the transmission-line matrix method can be used to model

29240-439: The introduction of the non-constituency members of parliament in 1984 to allow up to three losing candidates from opposition parties to be appointed as MPs. Group representation constituencies (GRCs) were introduced in 1988 to create multi-seat electoral divisions, intended to ensure minority representation in parliament. Nominated members of parliament were introduced in 1990 to allow non-elected non-partisan MPs. The constitution

29455-483: The invention of the compound optical microscope around 1595, and the refracting telescope in 1608, both of which appeared in the spectacle making centres in the Netherlands. In the early 17th century, Johannes Kepler expanded on geometric optics in his writings, covering lenses, reflection by flat and curved mirrors, the principles of pinhole cameras , inverse-square law governing the intensity of light, and

29670-491: The inventions of the maser in 1953 and of the laser in 1960. Following the work of Paul Dirac in quantum field theory , George Sudarshan , Roy J. Glauber , and Leonard Mandel applied quantum theory to the electromagnetic field in the 1950s and 1960s to gain a more detailed understanding of photodetection and the statistics of light. Classical optics is divided into two main branches: geometrical (or ray) optics and physical (or wave) optics. In geometrical optics, light

29885-546: The island became a global centre for rubber sorting and export. Singapore was not greatly affected by the First World War (1914–18), as the conflict did not spread to Southeast Asia . The only significant event during the war was the 1915 Singapore Mutiny by Muslim sepoys from British India, who were garrisoned in Singapore. After hearing rumours that they were to be sent to fight the Ottoman Empire ,

30100-504: The laws of reflection and refraction at interfaces between different media. These laws were discovered empirically as far back as 984 AD and have been used in the design of optical components and instruments from then until the present day. They can be summarised as follows: When a ray of light hits the boundary between two transparent materials, it is divided into a reflected and a refracted ray. The laws of reflection and refraction can be derived from Fermat's principle which states that

30315-498: The legal tradition established during British rule and with substantial local differences. Criminal law is based on the Indian Penal Code originally intended for British India , and was at the time as a crown colony also adopted by the British colonial authorities in Singapore and remains the basis of the criminal code in the country with a few exceptions, amendments and repeals since it came into force. Trial by jury

30530-411: The lens because of an earlier, bad experience: around 1916, he conducted an experiment with a Kodak camera; he left it in a cellar, and when he later retrieved it, he found that rats had eaten the bellows. This convinced him that a camera designed for photojournalism and operation in the tropics had to work perfectly, which excluded components that might rot. He ruled out a cloth shutter curtain for

30745-449: The light is modelled as a collection of particles called " photons ". Quantum optics deals with the application of quantum mechanics to optical systems. Optical science is relevant to and studied in many related disciplines including astronomy , various engineering fields, photography , and medicine (particularly ophthalmology and optometry , in which it is called physiological optics). Practical applications of optics are found in

30960-422: The light is reflected. This phenomenon is called total internal reflection and allows for fibre optics technology. As light travels down an optical fibre, it undergoes total internal reflection allowing for essentially no light to be lost over the length of the cable. A device that produces converging or diverging light rays due to refraction is known as a lens . Lenses are characterized by their focal length :

31175-477: The main island, training involving activities such as live firing and amphibious warfare are often carried out on smaller islands, typically barred to civilian access. However, large-scale drills, considered too dangerous to be performed in the country, have been performed in other countries such as Brunei, Indonesia, Thailand and the United States. In general, military exercises are held with foreign forces once or twice per week. Due to airspace and land constraints,

31390-507: The market. It had simpler Zeiss Triotar Lens, a steel back-plate, and a knob instead of a handle for winding on the film. The Rolleicord 1 cost 105  ℛ︁ℳ︁ ; altogether 2,699,505 Rolleicords were manufactured until production ceased in 1976. The later models (III - VB) uses Schneider Xenar lenses that have better optics. The release of the Rolleiflex Automat in the middle of June 1937 marked another significant milestone for Franke & Heidecke. Prior to this, after taking

31605-443: The mathematical rules of perspective and described the effects of refraction qualitatively, although he questioned that a beam of light from the eye could instantaneously light up the stars every time someone blinked. Euclid stated the principle of shortest trajectory of light, and considered multiple reflections on flat and spherical mirrors. Ptolemy , in his treatise Optics , held an extramission-intromission theory of vision:

31820-469: The merger would prevent Singapore from becoming a haven for communism. To obtain a mandate for a merger, the PAP held a referendum on the merger . This referendum included a choice of different terms for a merger with Malaysia and had no option for avoiding merger altogether. On 16 September 1963, Singapore joined with Malaya, the North Borneo, and Sarawak to form the new Federation of Malaysia under

32035-672: The merger, the Singaporean government and the Malaysian central government disagreed on many political and economic issues. Despite an agreement to establish a common market, Singapore continued to face restrictions when trading with the rest of Malaysia. In retaliation, Singapore did not extend to Sabah and Sarawak the full extent of the loans agreed to for economic development of the two eastern states. Talks soon broke down, and abusive speeches and writing became rife on both sides. This led to communal strife in Singapore, culminating in

32250-494: The merits of Aristotelian and Euclidean ideas of optics, favouring the emission theory since it could better quantify optical phenomena. In 984, the Persian mathematician Ibn Sahl wrote the treatise "On burning mirrors and lenses", correctly describing a law of refraction equivalent to Snell's law. He used this law to compute optimum shapes for lenses and curved mirrors . In the early 11th century, Alhazen (Ibn al-Haytham) wrote

32465-527: The new country, the development of its military forces became a priority. In addition, in October 1971, Britain pulled its military out of Singapore, leaving behind only a small British, Australian and New Zealand force as a token military presence. A great deal of initial support came from Israel , a country unrecognised by Singapore's neighbouring Muslim-majority nations of Malaysia and Indonesia. The Israel Defense Forces (IDF) commanders were tasked by

32680-761: The new port. The island was then nominally ruled by Tengku Abdul Rahman , the Sultan of Johor , who was controlled by the Dutch and the Bugis . However, the Sultanate was weakened by factional division: Abdul Rahman , the Temenggong of Johor to Tengku Abdul Rahman, as well as his officials, were loyal to the Sultan's elder brother Tengku Long , who was living in exile in Penyengat Island , Riau Islands . With

32895-407: The next half-century. Economic growth continued throughout the 1980s, with the unemployment rate falling to 3% and real GDP growth averaging at about 8% up until 1999. During the 1980s, Singapore began to shift towards high-tech industries, such as the wafer fabrication sector, in order to remain competitive as neighbouring countries began manufacturing with cheaper labour. Singapore Changi Airport

33110-405: The object and image distances are positive if the object and image are on opposite sides of the lens. Incoming parallel rays are focused by a converging lens onto a spot one focal length from the lens, on the far side of the lens. This is called the rear focal point of the lens. Rays from an object at a finite distance are focused further from the lens than the focal distance; the closer the object

33325-401: The optical explanations of astronomical phenomena such as lunar and solar eclipses and astronomical parallax . He was also able to correctly deduce the role of the retina as the actual organ that recorded images, finally being able to scientifically quantify the effects of different types of lenses that spectacle makers had been observing over the previous 300 years. After the invention of

33540-676: The path taken between two points by a ray of light is the path that can be traversed in the least time. Geometric optics is often simplified by making the paraxial approximation , or "small angle approximation". The mathematical behaviour then becomes linear, allowing optical components and systems to be described by simple matrices. This leads to the techniques of Gaussian optics and paraxial ray tracing , which are used to find basic properties of optical systems, such as approximate image and object positions and magnifications . Reflections can be divided into two types: specular reflection and diffuse reflection . Specular reflection describes

33755-473: The period of hyperinflation in Germany, Paul Franke lived up to his reputation as a savvy financier: he invested the income from exports (in foreign currency) so astutely that the company came through this difficult period unscathed – a rather unlikely outcome if Heidecke, alone, had made these decisions. During this period the company acquired new premises. The City Council in Braunschweig did not really want

33970-517: The population has also affected the way the SAF has been designed, with a small active force and a large number of reserves. Singapore has conscription for all able-bodied males at age 18, except those with a criminal record or who can prove that their loss would bring hardship to their families. Males who have yet to complete pre-university education, are awarded the Public Service Commission (PSC) scholarship, or are pursuing

34185-655: The press as well as some civil and political rights. In 2023, Singapore was ranked 129th out of 180 nations by Reporters Without Borders on the global Press Freedom Index . Freedom House ranks Singapore as "partly free" in its Freedom in the World report, and the Economist Intelligence Unit ranks Singapore as a "flawed democracy", the second freest rank of four, in its " Democracy Index ". All public gatherings of five or more people require police permits, and protests may legally be held only at

34400-732: The production of professional medium format cameras and slide projectors , while RCP-Technik GmbH & Co. KG in Hamburg was responsible for Rollei consumer products like re-branded compact digital cameras in the European market, and with the RCP Technik Verwaltungs GmbH owning the rights to the "Rollei" and "Rolleiflex" brands. Finally, Rollei Metric GmbH took over the photogrammetry business. In early 2009, Franke & Heidecke GmbH, Feinmechanik und Optik declared itself insolvent. Since 2009 Rolleiflex medium format cameras, Rollei 35 and Rolleivision slide projectors were being produced by

34615-511: The propagation of light in systems which cannot be solved analytically. Such models are computationally demanding and are normally only used to solve small-scale problems that require accuracy beyond that which can be achieved with analytical solutions. All of the results from geometrical optics can be recovered using the techniques of Fourier optics which apply many of the same mathematical and analytical techniques used in acoustic engineering and signal processing . Gaussian beam propagation

34830-442: The public nor elites had experience with democracy" helped create Singapore's political culture, as dominated by status-focused hierarchies committed to economic development. The legacy of Asian values and the limited political culture within Singapore has led to the country being described as "classic illustration of soft authoritarianism", and "profoundly illiberal". The judicial system is based on English common law , continuing

35045-434: The range, providing a major boost to Rollei's turnover. In 1963, Rollei introduced the Rollei 16 , its first all-new camera design since the war. It was a 16 mm camera in the format 12 mm × 17 mm with a Tessar f/2.8, 25 mm lens and cost 425 DM. In retrospect, it seems unlikely that such an unusual format might return Rollei to profitability. However, the German camera industry believed that this

35260-416: The ray-based model of light was developed first, followed by the wave model of light. Progress in electromagnetic theory in the 19th century led to the discovery that light waves were in fact electromagnetic radiation. Some phenomena depend on light having both wave-like and particle-like properties . Explanation of these effects requires quantum mechanics . When considering light's particle-like properties,

35475-416: The rays (or flux) from the eye formed a cone, the vertex being within the eye, and the base defining the visual field. The rays were sensitive, and conveyed information back to the observer's intellect about the distance and orientation of surfaces. He summarized much of Euclid and went on to describe a way to measure the angle of refraction , though he failed to notice the empirical relationship between it and

35690-423: The reflected light depending on the microscopic structure of the material. Many diffuse reflectors are described or can be approximated by Lambert's cosine law , which describes surfaces that have equal luminance when viewed from any angle. Glossy surfaces can give both specular and diffuse reflection. In specular reflection, the direction of the reflected ray is determined by the angle the incident ray makes with

35905-453: The repeal will not affect the recognition of "traditional familial and societal norms," including how marriage is defined, leaving the legal status of same-sex marriage unchanged for the time, although the possibility of civil unions was not officially ruled out. Lee described this as a compromise between the conservative (and often religious) and progressive elements of Singaporean society to prevent further political fracturing. The law

36120-406: The right-hand side, the winding handle and a frame counter. There was also a filter turret. A special flash bulb could be attached for flash photography, in which case a battery pack had to be installed inside the housing. Of course, a viewfinder frame could also be screwed onto the housing. Although there were many imitators, none could match the quality of the original Rolleiflex – that is, until

36335-415: The same distance behind the mirror as the objects are in front of the mirror. The image size is the same as the object size. The law also implies that mirror images are parity inverted, which we perceive as a left-right inversion. Images formed from reflection in two (or any even number of) mirrors are not parity inverted. Corner reflectors produce reflected rays that travel back in the direction from which

36550-462: The same reason, choosing instead a Compur mechanical shutter . Focusing in the "Rolleiflex" was achieved by moving the carriage that held both the viewfinder and the imaging lens, i.e. the camera had so-called "metallic bellows"; that is, the plate enclosed the sides of the case. It was crucial that the plate remained parallel as it moved during focusing; to achieve this, Heidecke developed an ingenious design which proved to be highly successful. Behind

36765-699: The same sex were not wrong at all or not wrong most of the time, up from 10% in 2013. The survey found that 27% felt the same way about same-sex marriage (an increase from 15% in 2013) and 30% did so about same-sex couples adopting a child (an increase from 24% in 2013). In 2021, six Singaporeans protested for improved trans protections in the educational system outside the Ministry of Education headquarters at Buona Vista . Pimps often traffic women from neighbouring countries such as China , Malaysia and Vietnam at their brothels as well as rented apartments and hostels for higher profit margins when they get

36980-407: The same side of the lens as the object. The closer the object is to the lens, the closer the virtual image is to the lens. As with mirrors, upright images produced by a single lens are virtual, while inverted images are real. Lenses suffer from aberrations that distort images. Monochromatic aberrations occur because the geometry of the lens does not perfectly direct rays from each object point to

37195-481: The settlement, and the island faded into obscurity for the next two centuries. By then, Singapore was nominally part of the Johor Sultanate . The wider maritime region and much trade was under Dutch control for the following period after the 1641 Dutch conquest of Malacca . The British governor Stamford Raffles arrived in Singapore on 28 January 1819 and soon recognised the island as a natural choice for

37410-405: The simple equation 1 S 1 + 1 S 2 = 1 f , {\displaystyle {\frac {1}{S_{1}}}+{\frac {1}{S_{2}}}={\frac {1}{f}},} where S 1 is the distance from the object to the lens, θ 2 is the distance from the lens to the image, and f is the focal length of the lens. In the sign convention used here,

37625-464: The spectacle making centres in both the Netherlands and Germany. Spectacle makers created improved types of lenses for the correction of vision based more on empirical knowledge gained from observing the effects of the lenses rather than using the rudimentary optical theory of the day (theory which for the most part could not even adequately explain how spectacles worked). This practical development, mastery, and experimentation with lenses led directly to

37840-433: The structure and responsibility of governance. The President is the head of state . The governance of Singapore is separated into three branches: The president is directly elected by popular vote for a renewable six-year term. Requirements for this position, which were enacted by the PAP government, are extremely stringent, such that only a handful of people qualify for the candidacy. These qualifications include that

38055-627: The subject of academic debates, it is nevertheless known from various documents that Singapore in the 14th century, then known as Temasek , was a trading port under the influence of both the Majapahit Empire and the Siamese kingdoms, and was a part of the Indosphere . These Indianised kingdoms were characterised by surprising resilience, political integrity and administrative stability. Historical sources also indicate that around

38270-444: The superposition principle can be used to predict the shape of interacting waveforms through the simple addition of the disturbances. This interaction of waves to produce a resulting pattern is generally termed "interference" and can result in a variety of outcomes. If two waves of the same wavelength and frequency are in phase , both the wave crests and wave troughs align. This results in constructive interference and an increase in

38485-417: The telescope, Kepler set out the theoretical basis on how they worked and described an improved version, known as the Keplerian telescope , using two convex lenses to produce higher magnification. Optical theory progressed in the mid-17th century with treatises written by philosopher René Descartes , which explained a variety of optical phenomena including reflection and refraction by assuming that light

38700-440: The term "light" is also often applied to infrared (0.7–300 μm) and ultraviolet radiation (10–400 nm). The wave model can be used to make predictions about how an optical system will behave without requiring an explanation of what is "waving" in what medium. Until the middle of the 19th century, most physicists believed in an "ethereal" medium in which the light disturbance propagated. The existence of electromagnetic waves

38915-402: The terms of the Malaysia Agreement . Under this Agreement, Singapore had a relatively high level of autonomy compared to the other states of Malaysia. Indonesia opposed the formation of Malaysia due to its own claims over Borneo and launched Konfrontasi ("Confrontation" in Indonesian) in response to the formation of Malaysia. On 10 March 1965, a bomb planted by Indonesian saboteurs on

39130-406: The time production ceased in 1968, over 67,000 units had been made. By this time few amateur photographers made contact prints any more, preferring instead to take 35 mm transparencies (slides), which could be viewed on a slide projector . In 1932, Salomon Kahn, the owner of the renowned Fotostudios Kardas in Berlin, approached Rollei, asking if they could build him a large Rolleiflex for

39345-479: The trade unions and Chinese schools, waged a guerrilla war against the government, leading to the Malayan Emergency . The 1954 National Service riots , Hock Lee bus riots , and Chinese middle schools riots in Singapore were all linked to these events. David Marshall , pro-independence leader of the Labour Front , won Singapore's first general election in 1955. He led a delegation to London , and Britain rejected his demand for complete self-rule. He resigned and

39560-425: The two. It was thought that reuniting with Malaya would benefit the economy by creating a common market, alleviating ongoing unemployment woes in Singapore. However, a sizeable left-wing faction of the PAP was strongly opposed to the merger, fearing a loss of influence, and hence formed the Barisan Sosialis , after being kicked out from the PAP. The ruling party of Malaya, United Malays National Organisation (UMNO),

39775-575: The victory as deciding the general situation of the war. Between 5,000 and 25,000 ethnic Chinese people were killed in the subsequent Sook Ching massacre . British forces had planned to liberate Singapore in 1945/1946; however, the war ended before these operations could be carried out. After the Japanese surrender to the Allies on 15 August 1945, Singapore fell into a brief state of violence and disorder; looting and revenge-killing were widespread. British, Australian, and Indian troops led by Lord Louis Mountbatten returned to Singapore to receive

39990-454: The viewfinder up to a distance of 4m from the object. The 4-element Mutar wide-angle converter magnified 0.7×, weighed 437 g and could render an object accurately from a distance of 1 meter. In all cases, for the best image quality, closing down the aperture two stops was recommended. This explains why conversion lenses of this type were only regarded as a makeshift solution in comparison to fully interchangeable lenses. In response to

40205-410: The war, including those needed to supply utilities. A shortage of food led to malnutrition, disease, and rampant crime and violence. A series of strikes in 1947 caused massive stoppages in public transport and other services. However, by late 1947 the economy began to recover, facilitated by a growing international demand for tin and rubber. The failure of Britain to successfully defend its colony against

40420-410: The war. The company management believed that many Rollei photographers only made contact prints from their negatives because they had no access to enlargers . However, this was not practical in the case of the Babyflex as the negatives were simply too small. As a result, it was not until 1957 that a new version came onto the market priced at DM 355, firstly in grey, and later (from 1963) in black. By

40635-487: The world. It has the third highest population density of any country in the world , although there are numerous green and recreational spaces as a result of urban planning . With a multicultural population and in recognition of the cultural identities of the major ethnic groups within the nation, Singapore has four official languages : English , Malay , Mandarin , and Tamil . English is the common language , with exclusive use in numerous public services . Multi-racialism

40850-400: Was a famous instrument which used interference effects to accurately measure the speed of light. The appearance of thin films and coatings is directly affected by interference effects. Antireflective coatings use destructive interference to reduce the reflectivity of the surfaces they coat, and can be used to minimise glare and unwanted reflections. The simplest case is a single layer with

41065-494: Was abolished in 1970. Singapore is known for its strict laws and conservative stances on crime; both corporal punishment (by caning ) and capital punishment (by hanging ) are retained and commonly used as legal penalties. The right to freedom of speech and association is guaranteed by Article 14(1) of the Constitution of Singapore , although there are provisions in the subsequent subsection that regulate them. The government has restricted freedom of speech and freedom of

41280-420: Was amended in 1991 to provide for an elected president who has veto power in the use of past reserves and appointments to certain public offices. In 1990, Goh Chok Tong succeeded Lee and became Singapore's second prime minister. During Goh's tenure, the country went through the 1997 Asian financial crisis and the 2003 SARS outbreak. In 2004, Lee Hsien Loong , the eldest son of Lee Kuan Yew , became

41495-411: Was chosen in part to remind the management at Voigtländer that they had restricted Heidecke in his work there. The Heidoscop was a great success, exceeding all expectations. In 1923, the company introduced a Heidoscop for 117 format (B1) roll-film. It was from this product, the "'Roll-film Heidoscop"', that the name Rollei was derived, which later became the name of company. Between 1914 and 1923,

41710-540: Was emitted by objects which produced it. This differed substantively from the ancient Greek emission theory. In the late 1660s and early 1670s, Isaac Newton expanded Descartes's ideas into a corpuscle theory of light , famously determining that white light was a mix of colours that can be separated into its component parts with a prism . In 1690, Christiaan Huygens proposed a wave theory for light based on suggestions that had been made by Robert Hooke in 1664. Hooke himself publicly criticised Newton's theories of light and

41925-410: Was entered into the German Trade Register on 1 February 1920. In need of factory space, they rented several rooms in a house at Viewegstraße 32, which became the companies first headquarters. The house survived World War II intact and stands to this day. Other rooms in the house were used by a dancing school, who had to abandon their dancing lessons because of noise from the factory. Within

42140-449: Was equal to that of Zeiss. Paul Franke's untimely death in the spring of 1950 had serious consequences for the company though. Not only did his passing mark the end of an era for Rollei, the loss of his business acumen also led the company to the edge of ruin on more than one occasion. After Paul Franke's death, his son Horst Franke succeeded him. Overall, he proved to be less effective as a manager than his father. In particular, he lacked

42355-495: Was expected of the new camera. However, Paul Franke proposed a temporary suspension of further development work because of the catastrophic economic situation. Heidecke concurred, believing that better times lay ahead. The first prototype of the new camera, named the Rolleiflex , was finally completed in 1927; it was built for absolute reliability and featured a rigid, injection-moulded housing made of aluminium . Heidecke wanted to avoid conventional leather bellows for focusing

42570-419: Was formed with reduced staffing, and more or less the same people leading the business; the manufacturing and sale of projectors and twin-lens reflex cameras, as well as that of the series 6000, was stopped, to concentrate on the Hy6 and accessories. A new battery and charger for owners of the 6000 series were however released to the market in 2019, as the original NiCd batteries could age prematurely. As of 2015

42785-404: Was founded in 1920 as the Werkstatt für Feinmechanik und Optik, Franke & Heidecke in order to make a twin-lens reflex camera . The company changed its name and legal form many times: to Rollei-Werke Franke & Heidecke in 1962, to Rollei-Werke Franke & Heidecke GmbH & Co. KG in 1979, to Rollei Fototechnic GmbH & Co. KG in 1981, and finally to Rollei GmbH in 2004. In 2006,

43000-432: Was fully occupied with defending Britain, leaving Singapore vulnerable to Japanese invasion . During the Pacific War , the Japanese invasion of Malaya culminated in the Battle of Singapore . When the British force of 60,000 troops surrendered on 15 February 1942, British prime minister Winston Churchill called the defeat "the worst disaster and largest capitulation in British history". British and Empire losses during

43215-456: Was granted in 1959. The PAP, self-described as pragmatic, have a syncretic ideology combining free-market principles , civil nationalism , and welfarism . Despite promulgating restrictions on civil liberties, Singapore under the PAP has seen consistent economic growth and political stability. The most represented and popular opposition party is the centre-left Workers' Party , which holds 8 seats in Parliament. The long-standing hegemony of

43430-403: Was nonetheless the largest dry dock in the world, the third-largest floating dock , and had enough fuel tanks to support the entire British navy for six months. The base was defended by heavy 15-inch (380 mm) naval guns stationed at Fort Siloso , Fort Canning and Labrador, as well as a Royal Air Force airfield at Tengah Air Base . Winston Churchill touted it as the " Gibraltar of

43645-413: Was officially repealed on 3 January 2023. Pink Dot SG , an event held in support of the LGBT community, has drawn thousands of people annually since 2009 with increasing attendance. According to a survey conducted by the Institute of Policy Studies in 2019, Singaporean society has become more liberal on LGBT rights. In the survey, more than 20% of people said that sexual relations between adults of

43860-399: Was one of the earliest references to Singapore Island, which corresponds to a Chinese account from the third century referred to a place as Pú Luó Zhōng ( Chinese : 蒲 羅 中 ), a transcription of the Malay name for 'island at the end of a peninsula '. Early references to the name Temasek (or Tumasik) are found in the Nagarakretagama , a Javanese eulogy written in 1365, and

44075-488: Was opened in 1981 and Singapore Airlines was formed. The Port of Singapore became one of the world's busiest ports and the service and tourism industries also grew immensely during this period. The PAP has remained in power since independence. Some activists and opposition politicians see the government's strict regulation of political and media activities as an infringement on political rights. In response, Singapore has seen several significant political changes, such as

44290-591: Was particularly well-suited to portrait photography . Meanwhile, plans for another model with a 150 mm lens were abandoned. The Wide Angle Rolleiflex (also known as the Rolleiwide ) with an f/4, 55 mm lens followed in 1961. It only remained in production until 1967, which today makes it one of the rarest Rolleiflex cameras – excluding special editions. Its main advantage lay in its ability to photograph large crowds at heavily attended events. Reinhold Heidecke kept on making new cameras right up until his death in 1960, although no one bothered to admonish him over

44505-467: Was predicted in 1865 by Maxwell's equations . These waves propagate at the speed of light and have varying electric and magnetic fields which are orthogonal to one another, and also to the direction of propagation of the waves. Light waves are now generally treated as electromagnetic waves except when quantum mechanical effects have to be considered. Many simplified approximations are available for analysing and designing optical systems. Most of these use

44720-448: Was relatively expensive at 435 DM. It featured an automatic exposure control system driven by a coupled selenium light meter which could select shutter speeds from 1/30 sec to 1/300 sec and apertures from f/3.5 to f/22. There were only two manual controls: one for focusing, the other for selecting either a shutter speed of 1/30 sec (for flash photography), or Brief (for long-exposure night photography ). Its successor,

44935-512: Was replaced by Lim Yew Hock in 1956, and after further negotiations Britain agreed to grant Singapore full internal self-government for all matters except defence and foreign affairs on 3 June 1959. Days before, in the 30 May 1959 election , the People's Action Party (PAP) won a landslide victory. Governor Sir William Allmond Codrington Goode served as the first Yang di-Pertuan Negara (Head of State). PAP leaders believed that Singapore's future lay with Malaya, due to strong ties between

45150-427: Was signed on 6 February 1819. In 1824, a further treaty with the Sultan led to the entire island becoming a part of the British Empire . In 1826, Singapore became part of the Straits Settlements , then under the jurisdiction of British India . Singapore became the regional capital in 1836. Prior to Raffles' arrival, there were only about a thousand people living on the island, mostly indigenous Malays along with

45365-415: Was so popular that it bred over 500 imitations, more than half of them from Japan . The factory grew rapidly; by 1956 – the year the millionth camera was sold – the workforce numbered 1600, and by 1957 the workforce had grown to 2000 employees. Hans Hass , the underwater diving pioneer, approached Franke & Heidecke to see if they could make him a special housing suitable for underwater photography . As

45580-410: Was staunchly anti-communist, and it was suspected UMNO would support the non-communist factions of PAP. UMNO, initially sceptical of the idea of a merger due to distrust of the PAP government and concern that the large ethnic Chinese population in Singapore would alter the racial balance in Malaya on which their political power base depended, became supportive of the idea of the merger due to joint fear of

45795-438: Was still prone to failure. While it was no threat to the fully developed Rolleiflex to begin with, that situation changed when the legendary Hasselblad 500C featuring a Compur leaf shutter appeared in 1957. The management of Rollei under Horst Franke were caught napping, having failed to produce a camera that could match the latest Hasselblad. As a consequence, sales plummeted and the company got into financial difficulties. In

46010-439: Was the way forward, and both Leica and Wirgin (through their Edixa brand) produced similar designs. The Rollei 16 used special Super 16 film cartridges with a capacity of 18 frames. As no film manufacturer was interested in making this film format, Rollei had to manufacture the film itself. A roll of B/W film cost 5 DM, while slide film (available until 1981) cost 12.50 DM, including development. Loading

46225-452: Was working as a production manager at Voigtländer in Braunschweig around 1916, he got the idea to manufacture a new type of roll-film camera. However, the company rejected his proposal because they thought there would be problems keeping the film perfectly flat . Besides, their current camera range, which used conventional photographic plates , was selling well. Heidecke tried unsuccessfully to secure financing to start his own company, so, at

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