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Photography Section
Zeiss Sonnar
The Sonnar is a photographic lens design originally patented by Carl Zeiss, notable for its relatively light weight, simple design and fast aperture. The name “Sonnar” is derived from the German word “sonne”, meaning sun. It was given this name because its large aperture (f/2.0) made it considerably brighter than many other lenses available […]
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Zeiss Planar
The Zeiss Planar is a famous photographic lens design by Paul Rudolph.
The original Planar is a six-element symmetrical designed by Paul Rudolph (physicist) at Carl Zeiss in 1896. While very sharp, the lens suffered from flare due to the large number of air-to-glass surfaces. Thus, it was temporarily pushed aside in favour of the […]
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Zeiss formula
In photographic optics, the so-called Zeiss formula is sometimes said to be used for computing a circle of confusion (CoC) criterion for depth of field (DOF) calculations. The formula is c = d/1730, where d is the diagonal measure of a camera format, film, sensor, or print, and c the maximum acceptable diameter of […]
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X-sync
X-sync is the correct flash synchronization between a shutter and the connection to an electronic unit. On some (older) cameras, there may be two settings for shutter synchronisation to the flash unit: one for disposable flash bulbs, and one for electronic flashes. The old flash-bulbs need some time to reach their full strength, and […]
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Xenon flash lamp
A xenon flash lamp is an electric glow discharge lamp designed to produce extremely intense, incoherent, full-spectrum white light for very short durations.
Construction
The lamp is comprised of a sealed tube, often made of fused quartz, which is filled with a mixture of gases, primarily xenon, and electrodes to carry electrical current to the gas […]
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Wratten number
Wratten numbers are a labeling system for optical filters, usually for photographic use.
They are named for the man who founded the first company, Frederick Wratten, a British inventor. Wratten and partner C. E. K. Mees sold their company to Eastman Kodak in 1912, and Kodak continued to produce “Wratten Filters” for decades. Even now, […]
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Wood’s glass
Wood’s glass was developed by Robert Williams Wood (1868–1955) as a light filter used in communications during World War I. His “invisible radiation” technique worked both in infrared daylight communication and ultraviolet night communications. His glass filter removed the visible components of a light beam, leaving only the ‘invisible radiation’ as a signal beam. […]
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Woodburytype
The term Woodburytype refers to both a photomechanical process and the print produced by this process. The process produces continuous tone images in slight relief. With the aid of a gum bichromate process a gelatin relief is prepared and an intaglio plate made. This plate is used as a mold and is filled with […]
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Wildlife photography
Wildlife photography is the act of taking photographs of wildlife.
The art of good wildlife photography is regarded as being one of the more challenging forms of photography as it has several different requirements.
* Being a technically sound photographer, thus being able to expose correctly to have the desired effect of […]
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Widelux
The Widelux is a fully mechanical swing-lens panoramic camera first developed in Japan in 1948, with both 35mm(the F6, F7 and F8 models) and medium-format (1500) models available. WIDELUX is a synonym of great panoramic cameras: shooting with an angle of 140° (usual cameras can only get 60°). The WIDELUX cameras manage this trick […]
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