Misplaced Pages

#607392

106-401: It is autofocusing and has an electronically controlled focal plane shutter with speeds from 30 sec. to 1/4000 sec. with x- flash synchronization at shutter speeds up to 1/180 sec. It has built-in exposure metering with spot, center weighted and evaluative modes and also features a pop-up flash. Its ISO film speed equivalents range from 100 through 125, 160, 200, 400, 800 and 1600. The camera

212-417: A 35 mm rangefinder camera body, debuted in 1935. The Soviet Спорт (“Sport”), also a 24 mm by 36 mm image size, was prototyped in 1934 and went to market in 1937. K. Nüchterlein's Kine Exakta (Germany, 1936) was the first integrated 35 mm SLR to enter the market. Additional Exakta models, all with waist-level finders, were produced up to and during World War II . Another ancestor of

318-421: A roof pentaprism situated in the optical path between the reflex mirror and viewfinder. Light, which comes both horizontally and vertically inverted after passing through the lens, is reflected upwards by the reflex mirror, into the pentaprism where it is reflected twice to correct the inversions caused by the lens, and align the image with the viewfinder . When the shutter is released, the mirror moves out of

424-639: A 1.7 mm slit). The Nikon FE2 (Japan) had a 3.3 ms (at 7.3 m/s) curtain travel time and an X-sync speed of 1/250 s in 1983. The top speed remained 1/4000 s (with a 1.8 mm slit). The fastest focal-plane shutter ever used in a film camera was the 1.8 ms curtain travel time (at 13.3 m/s) duralumin and carbon fiber bladed one introduced by the Minolta Maxxum 9xi (named Dynax 9xi in Europe, α-9xi in Japan) in 1992. It provided

530-589: A 40 mm slit to allow for variance gives 1/50 s ⅓ stop slow). Some horizontal FP shutters exceeded these limits by narrowing the slit or increasing curtain velocity beyond the norm; however, these tended to be ultra-high-precision models used in expensive professional-level cameras. The first such shutter was to be found in the Konica F , released in February 1960. Called the Hi-Synchro, this shutter reached

636-549: A CCD sensor and another which is smaller and less sensitive. The purpose of this scheme is to provide greater resistance to the gross overexposure of highlights which is more common among digital cameras than film cameras. When used in 6 megapixel mode, the secondary, highlight sensor is disabled and only the larger sensor captures an image. The S3 can produce images in JPEG format with the option of three rendering tonalities. Two of these ('F1' and 'F2') are generally regarded to emulate

742-604: A DSLR model, the Contax N-Digital . This model was too late and too expensive to be competitive with other camera manufacturers. The Contax N-digital was the last Contax to use that maker's lens system, and the camera, while having impressive features such as a full-frame sensor, was expensive and lacked sufficient write-speed to the memory card for it to be seriously considered by some professional photographers. The digital single-lens reflex camera have largely replaced film SLRs design in convenience, sales and popularity at

848-453: A computer via a Firewire connection. A monochrome-only, Live View capability is available for image composition via the rear LCD screen of the camera. This can be viewed for a maximum duration of thirty seconds, at which time mirror lock up is automatically cancelled and default function resumes. On August 9, 2006, Fujifilm announced [1] a variation of the S3 Pro capable of photographing in

954-482: A dedicated system, once the dedicated electronic flash is inserted into the camera's hot shoe and turned on, there is then communication between camera and flash. The camera's synchronization speed is set, along with the aperture. Many camera models measure the light that reflects off of the film plane, which controls the flash duration of the electronic flash. This is denoted TTL flash metering . Some electronic flash units can send out several short bursts of light to aid

1060-516: A fixed slit width. In the Kodak Cirkut (1907, US) and Globus Globuscope (1981, US) cameras, the entire camera and lens revolved as the film was pulled past the slit in the opposite direction. The Globuscope produced a 360° angle of view image in a 24×160 mm frame on 135 film with a 25 mm lens and had an adjustable slit width with a constant rotation speed. Revolving FP shutters produce images with unusual distortion where

1166-512: A matte focusing screen located just above the mirror system to diffuse the light. This permits accurate viewing, composing and focusing, especially useful with interchangeable lenses. Up until the 1990s, SLR was the most advanced photographic preview system available, but the recent development and refinement of digital imaging technology with an on-camera live LCD preview screen has overshadowed SLR's popularity. Nearly all inexpensive compact digital cameras now include an LCD preview screen allowing

SECTION 10

#1732800724608

1272-416: A maximum 1/12,000 s (with 1.1 mm slit) and 1/300 s X-sync. A later version of this shutter, spec'ed for 100,000 actuations, was used in the Minolta Maxxum 9  [ de ] (named Dynax 9 in Europe, α-9 in Japan) in 1998 and Minolta Maxxum 9Ti (named Dynax 9Ti in Europe, α-9Ti in Japan) in 1999. A parallel development to faster speed FP shutters was electronic shutter control. In 1966,

1378-457: A medium-format SLR with a between-the-lens leaf shutter system would be Hasselblad , with their 500C, 500 cm, 500 EL-M (a motorized Hasselblad) and other models (producing a 6 cm square negative). Hasselblads use an auxiliary shutter blind situated behind the lens mount and the mirror system to prevent the fogging of film. Other medium-format SLRs also using leaf shutters include the now discontinued Zenza-Bronica camera system lines such as

1484-400: A medium-wide lens encapsulated in a drum with a rear vertical slit. As the entire drum is horizontally pivoted on the lens's rear nodal point, the slit wipes an extra-wide-aspect image onto film held against a curved focal plane. The Widelux produced a 140° wide image in a 24×59 mm frame on 135 film with a Lux 26 mm f/2.8 lens and controlled shutter speed by varying rotation speed on

1590-409: A narrower depth of field, which is useful for blurring the background behind the subject, making the subject more prominent. "Fast" lenses are commonly used in theater photography, portrait photography, surveillance photography, and all other photography requiring a large maximum aperture. The variety of lenses also allows for the camera to be used and adapted in many different situations. This provides

1696-590: A photographer purchased one of these lenses, that lens included a leaf shutter in its lens mount. Because leaf shutters synchronized electronic flash at all shutter speeds especially at fast shutter speeds of 1 ⁄ 500 of a second or faster, cameras using leaf shutters were more desirable to studio photographers who used sophisticated studio electronic flash systems. Some manufacturers of medium-format 120 film SLR cameras also made leaf-shutter lenses for their focal-plane-shutter models. Rollei made at least two such lenses for their Rolleiflex SL-66 medium format which

1802-429: A reduced resolution of 4 megapixels from 16 MP. Single lens reflex A single-lens reflex camera ( SLR ) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras , the viewed image could be significantly different from

1908-603: A roof pentaprism or penta-mirror to direct the light to the eyepiece, first used on the 1948 Duflex constructed by Jenő Dulovits and patented August 1943 (Hungary). With this camera also appeared the first instant-return mirror . The first Japanese pentaprism SLR was the 1955 Miranda T , followed by the Asahi Pentax, Minolta SR-2, Zunow, Nikon F and the Yashica Pentamatic. Some SLRs offered removable pentaprisms with optional viewfinder capabilities, such as

2014-460: A round metal plate with a sector cutout in front of the film. In theory, rotary shutters can control their speeds by narrowing or widening the sector cutout (by using two overlapping plates and varying the overlap) and/or by spinning the plate faster or slower. However, most cameras' rotary shutters have fixed cutouts and can be varied in their spinning speed. The Olympus Pen F and Pen FT (1963 and 1966, both from Japan) half-frame 35 mm SLRs spun

2120-437: A rubberised silk cloth curtain (also called a blind ) with one or more width slit cutouts wound around two parallel drums and using springs to pull a slit from one drum to the other. The spring tension and the slit width can be adjusted. In 1883, Ottomar Anschütz (Germany) patented a camera with an internal roller blind shutter mechanism, just in front of the photographic plate. Thus, the focal-plane shutter in its modern form

2226-450: A second drum after a clockwork escapement timed delay (imagine two overlapping window shades) and moving at one speed (technically, the curtains are still accelerating slightly) across the film gate. Faster shutter speeds are provided by timing the second shutter curtain to close sooner after the first curtain opens and narrowing the slit, wiping the film. Dual curtain FP shutters are self-capping;

SECTION 20

#1732800724608

2332-417: A semicircular titanium plate to 1/500 s. Semicircular rotary shutters have unlimited X-sync speed, but all rotary FP shutters have the bulk required for the plate spin. The Univex Mercury (1938, US) half-frame 35 mm camera had a very large dome protruding out the top of the main body to accommodate its 1/1000 s rotary shutter. They also produce unusual distortion at very high speed because of

2438-452: A slit cutout mounted on rails in front of the camera lens that gravity dropped at a controlled rate. As the slit passed the lens, it "wiped" the exposure onto the photographic plate. With rubber bands to increase the drop speed, a 1/500 or 1/1000 s shutter speed could be reached. Eadweard Muybridge used shutters of this type in his trotting horse studies. By the 1880s, lens front-mounted accessory shutter boxes were available, containing

2544-399: A sophisticated interpolation system that produces an output image equivalent to 12.1 megapixels . The apparent resolution of images in this interpolated mode lay somewhere between 6.17 megapixels and the 12.34 megapixel interpolated output. Second, it uses two photodiodes in each photo site when capturing an image at full resolution, with a primary sensor providing the normal sensitivity of

2650-460: A speed of 1/2000 s and made possible flash synchronization at 1/125 s. In 1960, the Konica F (Japan) 35 mm SLR began a long term incremental increase in maximum shutter speeds with its "High Synchro" FP shutter. This shutter greatly improved efficiency over the typical Leica shutter by using stronger metal blade sheaves that were "fanned" much faster, vertically along the minor axis of

2756-459: A speed range of 1/10 to 1/1000 second. In 1925, the Leica A (Germany) 35 mm camera was introduced with a dual-cloth-curtain, horizontal-travelling-slit, focal-plane shutter. A dual curtain FP shutter does not have precut slits and the spring tension is not adjustable. The exposure slit is formed by drawing open the first curtain onto one drum and then pulling closed the second curtain off

2862-579: A vertical travel FP shutter with dual brass-slatted roller blinds with adjustable spring tension and slit width and a top speed of 1/1000 s (the Contax II of 1936 had a claimed 1/1250 s top speed). Although the Square shutter improved the FP shutter, it still limited maximum flash X-sync speed to 1/125 s (unless using special long-burn FP flash bulbs that burn throughout the slit wipe, making slit width irrelevant ). Some leaf shutters from

2968-419: A viewing image that will be exposed onto the negative exactly as it is seen through the lens. There is no parallax error, and exact focus can be confirmed by eye—especially in macro photography and when photographing using long focus lenses . The depth of field may be seen by stopping down to the attached lens aperture , which is possible on most SLR cameras except for the least expensive models. Because of

3074-402: Is available that slips onto the eyepiece of most SLRs and D-SLRs and allows viewing through a waist-level viewfinder. There is also a finder that provides EVF remote capability. Almost all contemporary SLRs use a focal-plane shutter located in front of the film plane, which prevents the light from reaching the film even if the lens is removed, except when the shutter is actually released during

3180-408: Is considered the first FP shutter of any kind. If the lens on a single curtain FP shutter camera has its lens cap off when the shutter is cocked, the film will be double exposed when the blind's cutout re-passes the film gate. A camera-mounted FP shutter can use a very narrow slit to have a 1/1000 second shutter speed—although the available contemporaneous ISO 1 to 3 equivalent speed emulsions limited

3286-463: Is discontinued and no longer in production. The camera's principal distinction is its 23mm x 15.5mm photo sensor. Designated the Super CCD SR, it is unique in two ways. First, like its predecessors used in the earlier FinePix S1 Pro and FinePix S2 Pro , it has its photodiodes oriented diagonally rather than horizontally and vertically as in all other DSLR cameras. This allows the use of

FinePix S3 Pro - Misplaced Pages Continue

3392-550: Is fully open and usable only for flash exposure up to 1/60 s, while vertical FP shutters are usually limited to 1/125 s. At higher speeds, a normal 1 millisecond electronic flash burst would expose only the part open to the slit. In 1986, the Olympus OM-4 T (Japan) introduced a system that could synchronize an Olympus F280 Full Synchro electronic flash to pulse its light at a 20 kilohertz rate for up to 40 ms to illuminate its horizontal FP shutter's slit as it crossed

3498-452: Is on the right side. Figure 2: The first shutter curtain begins to move to the left allowing the exposure to be made. Because the exposure requires a very fast shutter speed, the second curtain begins to move across at a set distance from the first one. Figure 3: The first shutter curtain continues to travel across the frame aperture followed by the second curtain. It would be pointless to use an electronic flash with this shutter speed as

3604-540: Is pre-tensioned to traverse the 36 millimeter wide film gate in 18 milliseconds (at 2 meters per second) and supports slit widths for a speed range of 1 to 1/1000 s. A minimum 2 mm wide slit produces a maximum 1/1000 s effective shutter speed. The dual curtain FP shutter has the same fast-speed distortion problems as the single curtain type. FP shutters were also common in medium-format 120 roll film cameras. Horizontal cloth FP shutters are normally limited to 1/1000 s maximum speed because of

3710-413: Is rarely enough room above and below the frame for a one-piece shutter. Vertical shutters became very common in the 1980s (though Konica , Mamiya , and Copal first pioneered their use in the 1950s and 1960s, and are almost exclusively used for new cameras. Nikon used Copal-made vertical plane shutters in their Nikomat/Nikkormat -range, enabling x-sync speeds from 1 ⁄ 30 to 1 ⁄ 125 while

3816-517: Is rated for 200,000 shutter cycles and the Nikon D3 is rated for 300,000 with its exotic carbon fiber/kevlar shutter. Because many SLRs have interchangeable lenses, there is a tendency for dust, sand and dirt to get into the main body of the camera through the mirror box when the lens is removed, thus dirtying or even jamming the mirror movement mechanism or the shutter curtain mechanism itself. In addition, these particles can also jam or otherwise hinder

3922-802: Is required. A small number of SLRs were built for APS such as the Canon IX series and the Nikon Pronea cameras. SLRs were also introduced for film formats as small as Kodak's 110 , such as the Pentax Auto 110 , which had interchangeable lenses. The Narciss camera is an all-metal 16 mm subminiature single lens reflex camera made by Russian optic firm Krasnogorsky Mekhanichesky Zavod (KMZ) Narciss (Soviet Union; Нарцисс) between 1961 and 1965. Other features found on many SLR cameras include through-the-lens (TTL) metering and sophisticated flash control referred to as "dedicated electronic flash". In

4028-512: Is the leaf shutter , whereby the shutter is constructed of diaphragm-like blades and can be situated either between the lens or behind the lens. If the shutter is part of a lens assembly some other mechanism is required to ensure that no light reaches the film between exposures. An example of a behind-the-lens leaf shutter is found in the 35 mm SLRs produced by Kodak , with their Retina Reflex camera line; Topcon, with their Auto 100; and Kowa with their SE-R and SET-R reflexes. A primary example of

4134-482: The Rolling shutter article. A large relative difference between a slow wipe speed and a narrow curtain slit results in distortion because one side of the frame is exposed at a noticeably later instant than the other and the object's interim movement is imaged. For a horizontal Leica-type FP shutter, the image is stretched if the object moves in the same direction as the shutter curtains, and compressed if travelling in

4240-413: The 35 mm format as, this film format offers a variety of emulsions and film sensitivity speeds, usable image quality and a good market cost. 35 mm film comes in a variety of exposure lengths: 20 exposure, 24 exposure and 36 exposure rolls. Medium format SLRs provide a higher-quality image with a negative that can be more easily retouched than the smaller 35 mm negative, when this capability

4346-563: The Nikon D1 digital SLR . The D1 used electronic assist from its sensor for the 1/16,000 s speed and its 15.6×23.7 mm "APS-size" sensor was smaller than 35 mm film and therefore easier to cross quickly for 1/500 s X-sync. However, with very limited need for such extremely fast speeds, FP shutters retreated to 1/8000 s in 2003 (and 1/250 s X-sync in 2006)—even in professional level cameras. In addition, since no specialised timers are needed for extremely slow speeds,

FinePix S3 Pro - Misplaced Pages Continue

4452-668: The Nikon F , F2 , and F3 . Other focal-plane shutter designs, such as the Copal Square, travelled vertically — the shorter travelling distance of 24 millimetres (as opposed to 36 mm horizontally) meant that minimum exposure and flash synchronisation times could be reduced. These shutters are usually manufactured from metal, and use the same moving-slit principle as horizontally travelling shutters. They differ, though, in usually being formed of several slats or blades, rather than single curtains as with horizontal designs, as there

4558-573: The Olympus OM-4 (both Japan) reached 240 s in 1983. The Pentax LX (Japan, 1980) and Canon New F-1 (Japan, 1981) had hybrid electromechanical FP shutters that timed their fast speeds mechanically, but used electronics only to extend the slow speed range; the LX to 125 s and the F-1N to 8 s. Electronics are also responsible for pushing the focal-plane shutter's X-sync speed beyond its mechanical limits. A horizontal FP shutter for 35 mm cameras

4664-888: The waist-level finder , the interchangeable sports finders used on the Canon F1 and F1n; the Nikon F, F2, F3, F4 and F5; and the Pentax LX. Another prism design was the porro prism system used in the Olympus Pen F , the Pen FT, the Pen FV half-frame 35 mm SLR cameras. This was later used on the Olympus EVOLT E-3x0 series, the Leica Digilux 3 and the Panasonic DMC-L1 . A right-angle finder

4770-456: The 1/500 second of the typical leaf shutter . While the concept of a travelling slit shutter is simple, a modern FP shutter is a computerised microsecond accurate timer, governing sub-gram masses of exotic materials, subjected to hundreds of gs acceleration, moving with micron precision, choreographed with other camera systems for 100,000+ cycles. This is why FP shutters are seldom seen in compact or point-and-shoot cameras. In addition,

4876-574: The 1960s could achieve at least 1/500 s flash sync. Copal collaborated with Nippon Kogaku to change the Compact Square shutter for the Nikon FM2 (Japan) of 1982 to using a honeycomb pattern-etched titanium foil for its blade sheaves. This permitted cutting shutter-curtain travel time by nearly half to 3.6 ms (at 6.7 m/s) and allowed 1/200 s flash X-sync speed. It also has a distortionless top speed of up to 1/4000 s (with

4982-762: The 1970s. The most notable were the Copal Compact Shutter (CCS), introduced by the Konica Autoreflex TC in 1976, and the Seiko Metal Focal-Plane Compact (MFC), first used in the Pentax ME in 1977. The Leica Camera (originally E. Leitz) switched to a vertical metal FP shutter in 2006 for its first digital rangefinder (RF) camera, the Leica M8 (Germany). The Contax (Germany) 35 mm RF camera of 1932 had

5088-427: The 19th century, as one increased-sensitivity process replaced another and larger aperture lenses became available, exposure times shortened to seconds and then to fractions of a second. Exposure timing control mechanisms became a necessary accessory and then a standard camera feature. The earliest manufactured shutter was the drop shutter of the 1870s. This was an accessory guillotine -like device—a wooden panel with

5194-416: The 2000s. Around 2010, the mirrorless technology utilized in point and shoot cameras made the way to the interchangeable lens cameras and slowly replaced DSLR technology. As of 2022, all the major camera brands (Except Pentax) ceased development and production of DSLRs and moved on to mirrorless systems . These systems offer multiple advantages to the photographer with regards to autofocus systems as well as

5300-470: The 24×36 mm frame. As perfected in 1965 by Copal, the Copal Square's slit traversed the 24 mm high film gate in 7 ms (3.4 m/s). This doubled the flash X-sync speed to 1/125 s. In addition, a minimum 1.7 mm wide slit would double the top shutter speed to a maximum of 1/2000 s. Most Squares were derated to 1/1000 s in the interest of reliability. Squares came from

5406-854: The Bronica ETRs, the ETRs'i (both producing a 6 × 4.5 cm. image), the SQ and the SQ-AI (producing a 6 × 6 cm image like the Hasselblad), and the Zenza-Bronica G system (6 × 7 cm). Certain Mamiya medium-format SLRs, discontinued camera systems such as the Kowa 6 and a few other camera models also used between-the-lens leaf shutters in their lens systems. Thus, any time

SECTION 50

#1732800724608

5512-457: The SLR's versatility, most manufacturers have a vast range of lenses and accessories available for them. Compared to most fixed-lens compact cameras, the most commonly used and inexpensive SLR lenses offer a wider aperture range and larger maximum aperture (typically f /1.4 to f /1.8 for a 50 mm lens). This allows photographs to be taken in lower light conditions without flash, and allows

5618-642: The SLR. In 1952, Asahi developed the Asahiflex and in 1954, the Asahiflex IIB . In 1957, the Asahi Pentax combined the fixed pentaprism and the right-hand thumb wind lever. Nikon , Canon and Yashica introduced their first SLRs in 1959 (the F , Canonflex , and Pentamatic, respectively). Canon, Nikon and Pentax have all developed digital SLR cameras (DSLRs) using the same lens mounts as on their respective film SLR cameras. Konica Minolta did

5724-1052: The VEB Pentacon Praktica electronic (East Germany) was the first SLR with an electronically controlled FP shutter. It used electronic circuitry to time its shutter instead of the traditional spring/gear/lever clockwork mechanisms. In 1971, the Asahi Pentax Electro Spotmatic (Japan; name shortened to Asahi Pentax ES in 1972; called Honeywell Pentax ES in US) tied its electronically controlled shutter to its exposure control light meter to provide electronic aperture-priority autoexposure. The traditional 1/1000 s and 1/2000 s top speeds of horizontal and vertical FP shutters are often 1 ⁄ 4 stop too slow, even in ultra-high-quality models. Spring powered geartrains reliably time any higher accelerations and shocks. For example, some highly tensioned FP shutters could suffer from "shutter curtain bounce". If

5830-443: The amount of light travelling to the film plane or sensor and also can distort the light passing through them, resulting in a less-sharp image. To avoid the noise and vibration, many professional cameras offer a mirror lock-up feature, however, this feature totally disables the SLR's automatic focusing ability. Electronic viewfinders have the potential to give the 'viewing-experience' of a DSLR (through-the-lens viewing) without many of

5936-572: The angular sweep of the exposure wipe. Bulk can be reduced by substituting blade sheaves for the plate, but then the rotary FP shutter essentially becomes a regular bladed FP shutter. The revolving drum is an unusual FP shutter that has been used in several specialised panoramic cameras such as the Panon Widelux (1959, Japan) and KMZ Horizont (1968, Soviet Union). Instead of using an extremely short focal length ( wide-angle ) lens to achieve an extra-wide field of view , these cameras have

6042-436: The autofocus system or for wireless communication with off-camera flash units. A pre-flash is often used to determine the amount of light that is reflected from the subject, which sets the duration of the main flash at time of exposure. Some cameras also employ automatic fill-flash, where the flash light and the available light are balanced. While these capabilities are not unique to the SLR, manufacturers included them early on in

6148-567: The capability to control perspective. With a triple-extension bellows 4" × 5" camera such as the Linhof SuperTechnika V, the photographer can correct certain distortions such as "keystoning", where the image 'lines' converge (i.e., photographing a building by pointing a typical camera upward to include the top of the building). Perspective correction lenses are available in the 35 mm and medium formats to correct this distortion with film cameras, and it can also be corrected after

6254-420: The clarity and shadow detail of a direct-viewed optical SLR viewfinder. Large format SLR cameras were probably first marketed with the introduction of C.R. Smith's Monocular Duplex (U.S., 1884). SLRs for smaller exposure formats were launched in the 1920s by several camera makers. The first 35 mm SLR available to the mass market, Leica's PLOOT reflex housing along with a 200 mm f4.5 lens paired to

6360-456: The curtains are designed to overlap as the shutter is cocked to prevent double exposure. Although self-capping dual curtain FP shutters date back to the late 19th century, the Leica design made them popular and virtually all FP shutters introduced since 1925 are dual curtain models. As revised in the 1954 Leica M3 (West Germany), a typical Leica-type horizontal FP shutter for 35 mm cameras

6466-460: The curtains are not properly braked after crossing the film gate, they might crash and bounce; reopening the shutter and causing double exposure ghosting bands on the image edge. Even the Nikon F2 's ultra-high precision shutter suffered from this as an early production teething problem. At first, electromagnets controlled by analogue resistor/capacitor timers were used to govern the release of

SECTION 60

#1732800724608

6572-404: The difficulties in precisely timing extremely narrow slits and the unacceptable distortion resulting from a relatively slow wipe speed. Their maximum flash synchronization speed is also limited because the slit is fully open only to the film gate (36 mm wide or wider) and able to be flash exposed up to 1/60 s X-synchronization (nominal; 18 ms = 1/55 s actual maximum; in reality,

6678-462: The disadvantages. More recently, Sony have resurrected the pellicle mirror concept in their " single-lens translucent " (SLT) range of cameras. SLRs vary widely in their construction and typically have bodies made of plastic or magnesium. Most manufacturers do not cite durability specifications, but some report shutter life expectancies for professional models. For instance, the Canon EOS 1Ds MkII

6784-636: The entire film gate—in effect, simulating long-burn FP flashbulbs —allowing flash exposure at shutter speeds as fast as 1/2000 s. There is a concomitant loss of flash range. Extended "FP flash" sync speeds began appearing in many high-end 35 mm SLRs in the mid-1990s, and reached 1/12,000 s in the Minolta Maxxum 9  [ de ] (Japan; called Dynax 9 in Europe, Alpha 9 in Japan) of 1998. They are still offered in some digital SLRs to 1/8000 s. Leaf shutter cameras are not affected by this issue. Focal-plane shutter top speed peaked at 1/16,000 s (and 1/500 s X-sync) in 1999 with

6890-419: The exposure is made. It is currently covered by the first shutter curtain, shown in red. The second shutter curtain shown in green is on the right side. Figure 2: The first shutter curtain moves fully to the left allowing the exposure to be made. At this point, the flash is made to fire if one is attached and ready to do so. Figure 3: After the required amount of exposure the second shutter curtain moves to

6996-529: The exposure. In addition, the movement of the reflex mirror takes time, limiting the maximum shooting speed. The mirror system can also cause noise and vibration. Partially reflective (pellicle) fixed mirrors avoid these problems and have been used in a very few designs including the Canon Pellix and the Canon EOS-1N RS , but these designs introduce their own problems. These pellicle mirrors reduce

7102-403: The exposure. There are various designs for focal plane shutters. Early focal-plane shutters designed from the 1930s onwards usually consisted of two curtains that travelled horizontally across the film gate: an opening shutter curtain followed by a closing shutter curtain. During fast shutter speeds, the focal-plane shutter would form a 'slit' whereby the second shutter curtain was closely following

7208-561: The fact with photo software when using digital cameras. The photographer can also extend the bellows to its full length, tilt the front standard and perform photomacrography (commonly known as ' macro photography '), producing a sharp image with depth-of-field without stopping down the lens diaphragm. Early SLRs were built for large format photography, but this film format has largely lost favor among professional photographers. SLR film-based cameras have been produced for most film formats as well as for digital formats. These film-based SLRs use

7314-407: The film plane. For slower shutter speeds, the first curtain opens (usually) from right to left, and after the required time with the shutter open, the second curtain closes the aperture in the same direction. When the shutter is cocked again the shutter curtains are moved back to their starting positions, ready to be released. Figure 1: The black rectangle represents the frame aperture through which

7420-411: The final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the light receptor and the image to be captured. Until the development of SLR, all cameras with viewfinders had two optical light paths: one through the lens to the film, and another positioned above ( TLR or twin-lens reflex ) or to the side ( rangefinder ). Because

7526-469: The first opening shutter curtain to produce a narrow, vertical opening, with the shutter slit moving horizontally. The slit would get narrower as shutter speeds were increased. Initially these shutters were made from a cloth material (which was in later years often rubberised), but some manufacturers used other materials instead. Nippon Kōgaku (now Nikon Corporation ), for example, used titanium foil shutters for several of their flagship SLR cameras, including

7632-414: The flash will also interfere. These cameras are often used for photographing large groups of people (e.g., the 'school' photograph). The subjects may be arranged in a shortened semicircle with the camera at the centre such that all the subjects are the same distance from the camera and facing the camera. Once the exposure is made and processed, the panoramic print shows everyone in a straight line facing in

7738-590: The focusing feature of a lens if they enter into the focusing helicoid. The problem of sensor cleaning has been somewhat reduced in DSLRs as some cameras have a built-in sensor cleaning unit. The price of SLRs in general also tends to be somewhat higher than that of other types of cameras, owing to their internal complexity. This is compounded by the expense of additional components, such as flashes or lenses. The initial investment in equipment can be prohibitive enough to keep some casual photographers away from SLRs, although

7844-410: The image center seems to bulge toward the viewer, while the periphery appears to curve away because the lens's field of view changes as it swivels. This distortion will disappear if the photograph is mounted on a circularly curved support and viewed with the eye at the center. Revolving shutters that do not rotate smoothly may create uneven exposure that will result in vertical banding in the image. Using

7950-596: The image sensor, replacing the traditional mechanical leaf shutter with delicate moving parts that can wear out, used by film-based point-and-shoot units. Something similar is also occurring with digital cameras that, in the past, would have used focal-plane shutters. For example, the Panasonic Lumix DMC-G3 (2011, Japan) interchangeable lens digital camera has an FP shutter, but in its 20 frames per second SH Burst mode, it locks its mechanical shutter open and electronically scans its digital sensor, although with

8056-468: The late 1980s. Minimizing mechanical moving parts also helped to prevent inertial shock vibration problems. A spring-wound clockwork escapement must completely unwind fairly quickly and limit the longest speed—generally to one full second, although the Kine Exakta (Germany) offered 12 s in 1936. The Olympus OM-2 's electronically timed horizontal FP shutter could reach 60 s in 1975 and

8162-427: The left to cover the frame aperture. When the shutter is recocked the shutter curtains are wound back to the right-hand side ready for the next exposure. This is a graphical representation only; the actual mechanisms are much more complex. For example, the shutter curtains actually roll on and off spools at either side of the frame aperture so as to use as little space as possible. Faster shutter speeds are achieved by

8268-648: The light path, and the light shines directly onto the film (or in the case of a DSLR , the CCD or CMOS imaging sensor). Exceptions to the moving mirror system include the Canon Pellix and Sony SLT cameras , along with several special-purpose high-speed cameras (such as the Canon EOS-1N RS), whose mirror was a fixed beamsplitting pellicle . Focus can be adjusted manually by the photographer or automatically by an autofocus system. The viewfinder can include

8374-597: The look of Fujifilm colour films. The third ('Standard') gives a more neutral image and may also be set for B&W (monochrome) capture. Like the S5 which superseded it, the S3 gained popularity amongst numerous, professional Wedding Photographers for its ability to more accurately render skin tones and for its wide dynamic range, compared to comparable digital cameras of its time. The S3 can utilise two types of memory card storage: CF and XD cards. The camera can be remotely tethered to

8480-405: The market for used SLRs has become larger particularly as photographers migrate to digital systems. The digital single-lens reflex camera has largely replaced the film SLR for its convenience, sales, and popularity at the start of the 21st century. These cameras were the marketing favorite among advanced amateur and professional photographers through the first two decades of

8586-404: The mirror box and pentaprism/pentamirror. The mirror box also prevents lenses with deeply recessed rear elements from being mounted close to the film or sensor unless the camera has a mirror lockup feature; this means that simple designs for wide angle lenses cannot be used. Instead, larger and more complex retrofocus designs are required. The SLR mirror 'blacks-out' the viewfinder image during

8692-401: The mirror moves upwards from its resting position in the direction of the arrow, the focal plane shutter opens, and the image is projected onto the film or sensor in exactly the same manner as on the focusing screen. This feature distinguishes SLRs from other cameras as the photographer sees the image composed exactly as it will be captured on the film or sensor . Most 35 mm SLRs use

8798-613: The modern SLR camera was the Swiss-made Alpa , which was innovative, and influenced the later Japanese cameras. The first eye-level SLR viewfinder was patented in Hungary on August 23, 1943, by Jenő Dulovits, who then designed the first 35 mm camera with one, the Duflex , which used a system of mirrors to provide a laterally correct, upright image in the eye-level viewfinder. The Duflex, which went into serial production in 1948,

8904-523: The only choice for focal plane shutters at that time was 1 ⁄ 60 . Later, Nikon again pioneered the use of titanium for vertical shutters, using a special honeycomb pattern on the blades to reduce their weight and achieve world-record speeds in 1982 of 1 ⁄ 4000 second for non-sync shooting, and 1 ⁄ 250 with x-sync. Nowadays most such shutters are manufactured from cheaper aluminium (though some high-end cameras use materials such as carbon-fibre and Kevlar ). Another shutter system

9010-404: The opportunities to use the high speeds. Folmer and Schwing (US) were the most famous proponents of single curtain FP shutters, with their large format sheet film Graflex single-lens reflex and Graphic press cameras using them from 1905 to 1973. Their most common 4×5 inch shutters had four slit widths ranging from 1 + 1 ⁄ 2 to 1 ⁄ 8 inch and up to six spring tensions for

9116-521: The opposite direction of them. For a downward-firing vertical Square-type FP shutter, the top of the image leans forward. The use of leaning to give the impression of speed in illustration is a caricature of the distortion caused by the slow-wiping vertical FP shutters of large format cameras from the first half of the 20th century. Instead of using relatively slow-moving mechanical shutter curtains, electro-optic devices such as Pockels cells can be employed as shutters. While not commonly used, they avoid

9222-466: The photographer to see what the CCD is capturing. However, SLR is still popular in high-end and professional cameras because they are system cameras with interchangeable parts, allowing customization. They also have far less shutter lag , allowing photographs to be timed more precisely. Also the pixel resolution, contrast ratio , refresh rate , and color gamut of an LCD preview screen cannot compete with

9328-423: The photographer with considerably more control (i.e., how the image is viewed and framed) than would be the case with a view camera. In addition, some SLR lenses are manufactured with extremely long focal lengths, allowing a photographer to be a considerable distance away from the subject and yet still expose a sharp, focused image. This is particularly useful if the subject includes dangerous animals (e.g., wildlife);

9434-401: The problems associated with travelling-curtain shutters such as flash synchronisation limitations and image distortions when the object is moving. Besides the horizontal Leica and vertical Square FP shutters, other types of FP shutters exist. The most prominent is the rotary or sector FP shutter. The rotary disc shutter is common in film and movie cameras, but rare in still cameras. These spin

9540-437: The same direction. The distortion present in the background betrays the technique. The earliest daguerreotype , invented in 1839, did not have shutters, because the lack of sensitivity of the process and the small apertures of available lenses meant that exposure times were measured in many minutes. A photographer could easily control exposure time by removing and returning the camera lens' lens cap or plug. However, during

9646-421: The same way as the horizontal shutters, with a shorter distance for the shutter blades to travel, only 24 mm as opposed to 36 mm. Focal-plane shutters can be built into the body of a camera that accepts interchangeable lenses, eliminating the need for each lens to have a central shutter built into it. Their fastest speeds are either 1/4000 second, 1/8000 second, or 1/12000 second; much higher than

9752-531: The same, and after having bought Konica Minolta's camera division in 2006. Sony continues using the Minolta AF lens mount in their DSLRs, including cameras built around a semi-transparent fixed mirror . Samsung builds DSLRs based on the Pentax lens mount. Olympus , on the other hand, chose to create a new digital-only Four Thirds System SLR standard, adopted later by Panasonic and Leica. Contax came out with

9858-475: The second curtain closing before the first one has fully opened; this results in a vertical slit that travels horizontally across the film. Faster shutter speeds simply require a narrower slit, as the speed of travel of the shutter curtains is not normally varied. Figure 1: The black rectangle represents the frame aperture through which the exposure is made. It is currently covered by the first shutter curtain, shown in red. The second shutter curtain shown in green

9964-596: The second shutter curtain (though still operated by spring power). In 1979, the Yashica Contax 139 Quartz (Japan) introduced digital piezoelectric quartz (shortly followed by ceramic) oscillator circuits (ultimately under digital microprocessor control) to time and sequence its entire exposure cycle, including its vertical FP shutter. Electric "coreless" micromotors, with near instantaneous on/off capability and relatively high power for their size, would drive both curtains and other camera systems replacing springs in

10070-524: The short duration flash would expose only a very small amount of the frame as the rest is covered by either the first or second shutter curtain. Figure 4: The first shutter curtain finishes moving, followed closely by the second curtain which is now covering the frame aperture completely. When the shutter is recocked both shutter curtains are wound back to the right-hand side ready for the next exposure. Most modern 35 mm and digital SLR cameras now use vertical travel metal blade shutters. These work in

10176-428: The slowest speed setting is usually 30 s. Instead, over the last twenty years, most effort has gone into improving durability and reliability. Whereas the best mechanically controlled shutters were rated for 150,000 cycles and had an accuracy of ±¼ stop from nominal value (more typically 50,000 cycles at ±½ stop). In the last few years, digital point-and-shoot cameras have been using timed electronic sampling of

10282-405: The start of the 21st century. A cross-section ( or 'side-view') of the optical components of a typical SLR camera shows how the light passes through the lens assembly, is reflected by the mirror placed at a 45-degree angle, and is projected on the matte focusing screen . Via a condensing lens and internal reflections in the roof pentaprism the image appears in the eyepiece. When an image is taken,

10388-552: The subject prefers anonymity to being photographed; or else, the photographer's presence is unwanted (e.g., celebrity photography or surveillance photography). Practically all SLR and DSLR camera bodies can also be attached to telescopes and microscopes via an adapter tube to further enhance their imaging capabilities. In most cases, single-lens reflex cameras cannot be made as small or as light as other camera designs—such as rangefinder cameras , autofocus compact cameras and digital cameras with electronic viewfinders (EVF)—owing to

10494-436: The supplier as complete drop-in modules. Square-type FP shutters were originally bulky in size and noisy in operation, limiting their popularity in the 1960s. Although Konica and Nikkormat and Topcon (D-1) were major users of the Copal Square. It moved from three-axis to four-axis designs (one control axis for each curtain drum axis instead of one control for both drums). New compact and quieter Square designs were introduced in

10600-435: The top models, whereas the best rangefinder cameras adopted such features later. Many of the advantages of SLR cameras derive from viewing and focusing the image through the attached lens. Most other types of cameras do not have this function; subjects are seen through a viewfinder that is near the lens, making the photographer's view different from that of the lens. SLR cameras provide photographers with precision; they provide

10706-635: The typical focal-plane shutter has flash synchronization speeds that are slower than the typical leaf shutter's 1/500 s, because the first curtain has to open fully and the second curtain must not start to close until the flash has fired. In other words, the very narrow slits of fast speeds will not be properly flash exposed. The fastest X-sync speed on a 35 mm camera is traditionally 1/60 s for horizontal Leica-type FP shutters and 1/125 s for vertical Square-type FP shutters. Focal-plane shutters may also produce image distortion of very fast-moving objects or when panned rapidly, as described in

10812-652: The ultraviolet and (principally) infrared spectra, the Fujifilm FinePix S3 Pro UVIR. [2] Focal plane shutter In camera design, a focal-plane shutter ( FPS ) is a type of photographic shutter that is positioned immediately in front of the focal plane of the camera, that is, right in front of the photographic film or image sensor . The traditional type of focal-plane shutter in 35 mm cameras, pioneered by Leitz for use in its Leica cameras , uses two shutter curtains, made of opaque rubberised fabric, that run horizontally across

10918-547: The viewfinder and the film lens cannot share the same optical path, the viewing lens is aimed to intersect with the film lens at a fixed point somewhere in front of the camera. This is not problematic for pictures taken at a middle or longer distance, but parallax causes framing errors in close-up shots. Moreover, it is not easy to focus the lens of a fast reflex camera when it is opened to wider apertures (such as in low light or while using low-speed film). Most SLR cameras permit upright and laterally correct viewing through use of

11024-527: Was a focal-plane shutter SLR. Rollei later switched to a camera system of leaf-shutter design (e.g., the 6006 and 6008 reflexes) and their current medium-format SLRs are now all of the between-the-lens shutter design. Since the technology became widespread in the 1970s, SLRs have become the main photographic instrument used by dedicated amateur photographers and professionals. Some photographers of static subjects (such as architecture, landscape, and some commercial subjects), however, prefer view cameras because of

11130-538: Was also the world's first SLR with an instant-return (a.k.a. autoreturn) mirror. The first commercially produced SLR that employed a roof pentaprism was the Italian Rectaflex A.1000, shown in full working condition on Milan fair April 1948 and produced from September the same year, thus being on the market one year before the east German Zeiss Ikon VEB Contax S , announced on May 20, 1949, produced from September. The Japanese adopted and further developed

11236-484: Was created. Goerz manufactured the Anschütz Camera as the first production FP shutter camera in 1890. Francis Blake invented a type of focal plane shutter camera in 1889 that achieved shutter speeds of 1/2000 second, and exhibited numerous stop-action photographs. A drop shutter-like mechanism with an adjustable slit was used at the focal plane of an apparently one-off William England camera in 1861 and this

#607392