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A “full-frame” type lens produces an image circle that is large enough to cover a 35mm sensor. Because APS-C sensors are smaller than 35mm sensors a full frame lens should be compatible with an APS-C sensor. An APS-C type lens often does not have the coverage to cast light on the entirety of a 35mm sensor, causing dark corners in the images ...
For example, a 24 mm lens on a camera with a crop factor of 1.5 has a 62° diagonal angle of view, the same as that of a 36 mm lens on a 35 mm film camera. On a full-frame digital camera, the 24 mm lens has the same 84° angle of view as it would on a 35 mm film camera.
The first lens to carry the Rokkor designation was a 200mm f / 4.5 lens that came with the hand-holdable aerial camera Chiyoda SK-100 in 1940. [1] After the Rokkor name was dropped and no longer engraved in new lenses after 1980/1981, [1] the Rokkor name resurfaced two times.
This means the crop factor for X system lenses (based on diagonal angle of view) compared to "full-frame" 135 is 0.79; for example, a X system lens with a focal length of 65 mm would have the equivalent coverage of a lens with a focal length of approximately 50 mm on a "full-frame" camera. X system lenses are designed by Hasselblad and ...
The idea of replacing the complicated Schmidt corrector plate with an easy-to-manufacture full-aperture spherical meniscus lens (a meniscus corrector shell) to create a wide-field telescope occurred to at least four optical designers in early 1940s war-torn Europe, including Albert Bouwers (1940), Dmitri Dmitrievich Maksutov (1941), K. Penning ...
DT lenses will not fully illuminate the sensor/film area of 24×36mm full-frame cameras. Three DT lenses were made and sold by Konica Minolta: 11–18, 18–70, and 18–200mm. G "Gold" series, Minolta's line-up of high-grade lenses. The "G" status does not occur as label on the lenses, but is indicated by a decorating ring on the lens. High Speed
There is no precise definition of the term, but lenses marketed as "standard zoom" usually cover a range of at least 30mm to 70mm in terms of 35mm equivalent focal length with an optical zoom ratio of 2.5× (e.g. 28-70mm) to 5× (e.g. 24-120mm) — the most common being 3× (e.g. 24-70mm). [1]
A body-cap lens is an extreme type of pancake lens that is designed to both protect the camera internals as a body cap normally would, yet still allow the user to take photos. These lenses are manual focus only and generally have no more than a couple of optical lens elements, no image correcting elements, a very-slow fixed aperture, an ...
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