The Sigma DP2 is a high-end compact digital camera introduced by the Sigma Corporation . It features a 14-megapixel Foveon X3 sensor (2652 × 1768 × 3 layers), the same sensor used in its predecessor, the Sigma DP1 and in the Sigma SD14 DSLR , a fixed 24.2 mm f / 2.8 lens (41 mm equivalent ), a 2.5” LCD and a pop-up flash.
22-539: With its predecessor, the DP1, it is one of the few "compact" cameras that featured sensor with a size equivalent to APS-C . Sigma claimed this (comparatively large) sensor size would result in DSLR quality images from a small, pocketable camera. The camera does not include auto or scene modes as it is not aimed against the average consumer. The DP series are therefore targeted against professional photographers or enthusiasts seeking
44-460: A " focal length multiplier" for comparing a proportionally scaled lens/image circle projection/sensor diameter) can be used to calculate the field of view in 35 mm terms from the actual focal length. The most common multiplier ratios: Canon, Fujifilm, Nikon, Pentax and Sony have developed and designed lenses specifically for their cameras with a lens factor (more fully, lens focal length conversion factor) or " crop factor ". While Canon uses
66-532: A Nikon FX (full-frame) digital body, by default the camera will automatically adjust the viewfinder to depict the DX frame area and crop the captured images to the DX image size. This can be overridden by the user if desired. Pentax produces the DA line for their APS-C cameras. These lenses are available in focal lengths that offer similar field-of-view as lenses previously available for 135 film. The trademark compact design of
88-643: A compact, yet capable camera. It was announced in September 2008, and began shipping in 2009. Differences to the DP1 include a lens that is one stop faster, f/2.8 vs. f/4.0, 24.2 vs. 16.6 mm (35 mm equivalent of 41 mm vs 28 mm) and a faster processing chip, the True II image processor, which is shared with the Sigma SD15 DSLR. Though claimed difficult to use, it shares many features and limitations found in rangefinder cameras such as
110-450: A factor of 1.6×, the other four brands all use 1.5×. APS-C cameras use a smaller area to form the image than traditional 35 mm cameras, and so lenses used on APS-C format cameras have a correspondingly narrower field of view. For example, a 28 mm lens is a wide angle lens on a traditional 35 mm camera. But the same lens on an APS-C camera, with a lens factor of 1.6× (relative to a standard full-frame 35 mm format camera), has
132-470: A higher SNR and generally less image noise . However, for practical applications, the image noise of an APS-C sensor cannot be directly compared to either smaller or bigger sensor sizes as there are also other variables to consider, such as advancements in image processing techniques. Most DSLR and third party lens manufacturers now make lenses specifically designed for APS-C cameras. The designations by brand include: A crop factor (sometimes referred to as
154-522: A much improved sensor. APS-C Advanced Photo System type-C ( APS-C ) is an image sensor format approximately equivalent in size to the Advanced Photo System film negative in its C ("Classic") format, of 25.1×16.7 mm, an aspect ratio of 3:2 and Ø 30.15 mm field diameter. It is therefore also equivalent in size to the Super 35 motion picture film format, which has
176-424: A slightly different angle of view from lenses at the same focal length and overall a much narrower angle of view compared to 35 mm film . This is why each manufacturer offers a range of lenses designed for its format. The signal-to-noise ratio for a given pixel is largely defined by the number of photons per pixel and the sensor readout noise. Larger pixel sizes can capture more photons per pixel thus giving
198-427: A strategic decision to specialize in developing telephoto lenses , releasing its first lens, 135 mm f /4.5 (Model #280), in 1958. The lens was branded Tamron, to honor its designer (Tamura Uhyoue), and used the T mount system, making it adaptable to bodies from multiple camera manufacturers. It was bundled with a dedicated 1.67× teleconverter . Taisei continued to develop the interchangeable mount, releasing
220-576: Is a Japanese company manufacturing photographic lenses , optical components and commercial/industrial-use optics. Tamron Headquarters is located in Saitama City in the Saitama Prefecture of Japan . The name of the company came from the surname of Uhyoue Tamura who was instrumental in developing Tamron's optical technologies. It was only on the company's 20th anniversary that the name was changed to Tamron (from Taisei Optical). In
242-471: Is a major shareholder in the company, with a 15.02% stake as of 2024 . Tamron has sold more than 5 million lenses as of September 2014. In the 2017 fiscal year, such lenses accounted for 74.9% of all sales. Most current Tamron lenses are available for Sony E -mount, Nikon F -mount, and Canon EF -mount Overall/General Optical technology Coating technology Autofocus/Electronic technology Weather-sealing technology Taisei Optical made
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#1732802314590264-673: Is considerably closer to the sensor or film plane than that of an EF (full-frame/35mm) or EF-S lens. Canon sells an optional adapter that allows EF-M bodies to accept all EF and EF-S lenses. Fujifilm debuted their X-mount range of lenses in early 2012. These lenses are designed for their X series cameras using APS-C sensors. Nikon makes DX format lenses for their line of APS-C digital cameras. These can be physically mounted to all Nikon digital and film SLR camera bodies since 1977. These lenses generally exhibit vignetting at shorter focal lengths when mounted on Nikon film bodies, but are typically usable at longer focal lengths. When mounted on
286-565: Is cropped and the resolution is roughly halved. E-mount lenses are compatible with all of the company's APS-C MILCs, from the NEX-3 and NEX-5 through the current α3000 , α5100 , α6500 , α6600, and α6700 . In addition, they can be mounted on Sony full-frame MILCs ( α7/α7R/α7S , α7R II , α7S II ) in "crop" mode (the company also produces E-mount lenses designated as "FE", which cover the entire full-frame image circle). Tamron Tamron Co., Ltd. ( 株式会社タムロン , Kabushiki-gaisha Tamuron )
308-566: The E-mount for their α MILCs. The DT lenses can be mounted on any Sony A-mount camera, but are specifically designed for the DSLR-A100 up to DSLR-A700 series of APS-C-format DSLRs, the earlier Konica Minolta 5D and 7D , and the most recent APS-C Alpha SLTs. DT lenses can be mounted on full-frame models like the DSLR-A850 , DSLR-A900 , and SLT-A99 in "crop" mode, where the frame
330-704: The Adapt-A-Matic (アダプトマチック) series starting in 1969 with the 70~220 mm f /4 (Model PZ-30Au), which added automatic diaphragm coupling capability, followed by the Adaptall (アダプトール) series starting in 1973. The Adaptall-2 series was introduced in 1979 and production continued until 2006. In the United States, Vernon Photographic Corporation (Mt. Vernon, New York) registered the trademark Edonar in 1967 for lenses sold under its own brand. Some Edonar lenses were built by Taisei Kogaku, as engraved on
352-576: The DA limited series takes advantage of the smaller APS-C format with the lenses under 40 mm and is fully usable on 135 Film with the DA Limited Lenses over 35 mm focal length. All DA lenses can be mounted on Pentax film bodies, albeit with increased vignetting . Some lens in the DA series cover 35 full frame format fully. Sony has two lines specifically designed for their APS-C cameras—the DT line for their A-mount DSLRs and α SLTs , and
374-575: The Leica M6, and with its mechanical-feedback manual focus, snaps images with zero shutter lag. In February 2010, Sigma released an updated version of the camera, the Sigma DP2s. The DP2s offers a new AF algorithm, a "power save" mode and a modified rear design with new labeling of the buttons. The imaging sensor itself remained the same. In 2012, Sigma released the 'Merrill' range of the DP series, with
396-447: The dimensions of 24.89 mm × 18.66 mm (0.980 in × 0.735 in) and Ø 31.11 mm field diameter. Sensors approximating these dimensions are used in many digital single-lens reflex cameras (DSLRs), mirrorless interchangeable-lens cameras (MILCs), and a few large-sensor live-preview digital cameras . APS-C size sensors are also used in a few digital rangefinders . Such sensors exist in many different variants depending on
418-511: The exception of the early Canon EOS D30 , Canon EOS D60 , and Canon EOS 10D , which predated the introduction of the mounting system. EF-S lenses will not physically mount on Canon's full-frame digital or 35mm film SLRs. More recently, the company introduced the EF-M line for its EOS M series of mirrorless interchangeable-lens cameras (MILCs). EF-M lenses will not physically mount on any Canon SLR, whether film or digital. The rear of an EF-M lens
440-606: The fiscal year ending 31 December 2017, net sales totaled 60.496 billion yen and operating income was 4.24 billion yen, up 79.8% from 2016. At that time, the consolidated company had 4,640 employees and five production plants: in Hirosaki, Namioka and Owani in Japan, and one in China and Viet Nam, respectively. Subsidiary companies were located in the U.S. , Germany , France , Hong Kong , Shanghai , Moscow and Haryana , India. Sony
462-644: The manufacturer and camera model. All APS-C variants are considerably smaller than 35 mm standard film which measures 36×24 mm. Because of this, devices with APS-C sensors are known as "cropped frame," especially when used in connection with lens mounts that are also used with sensors the size of 35 mm film: only part of the image produced by the lens is captured by the APS-C size sensor. Sensor sizes range from 20.7×13.8 mm to 28.7×19.1 mm, but are typically 22.3×14.9 mm for Canon and 23.5×15.6 mm for other manufacturers. Each variant results in
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#1732802314590484-573: The same angle of view as a 45 mm (28 mm × 1.6 lens factor) lens on a 35 mm camera—i.e. a normal lens. Several third-party lens manufacturers, such as Tamron , Tokina , and Sigma , also manufacture a range of lenses optimised for APS-C sensors. Canon introduced the Canon EF-S line of lenses in 2003 alongside the 300D. These lenses place the rear of the lens closer to the camera's sensor (referred to as short back focus ). EF-S lenses are compatible with Canon's APS-C digital SLRs, with
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