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A 1978 study by the FAA looked at the "aeromedical" implications of the X-chrom lens, finding that the lenses increased scores in pseudoisochromatic plates without increasing performance in practical tests (e.g. aviation signal light gun test). [4] They subsequently banned the use of X-chrom lenses during tests.
A case history using the X-Chrom lens for a rod monochromat is reported [60] and an X-Chrom manual is online. [61] Tinted glasses (e.g. Pilestone/Colorlite glasses) apply a tint (e.g. magenta) to incoming light that can distort colors in a way that makes some color tasks easier to complete.
This is a list of smartphones with a telephoto lens that offers a focal length (35mm equivalent) of at least 100mm or "4× optical zoom" with an imaging area equivalent to a 1/3.5″ or larger sensor. Smartphone lenses are often marketed in terms of "optical zoom" [1] relative to the phone's main camera. For example, 120mm is usually referred ...
HCD lenses are optimized for slightly smaller image sensors covering 48×36 mm (1.9×1.4 in), [95] so the crop factor for HCD lenses is slightly greater at 0.72. With these sensors, an 80 mm lens would have the equivalent coverage of a lens with a focal length of approximately 60 mm on a "full-frame" camera.
A telecentric lens is a special optical lens (often an objective lens or a camera lens) that has its entrance or exit pupil, or both, at infinity. The size of images produced by a telecentric lens is insensitive to either the distance between an object being imaged and the lens, or the distance between the image plane and the lens, or both, and ...
These new lenses included 35–80 mm f /4–5.6 (with built-in lens cap), 80–200 mm f /4.5–5.6, 35–105 mm f /3.5–4.5, 70–210 mm f /3.5–4.5, and 100–300 mm f /4.5–5.6. [ 4 ] Some of the original lenses were updated and re-released with the same cosmetics and are known as "New" or "Restyled" versions; minor optical updates such as ...
A photochromic eyeglass lens, part of the lens darkened after exposure to sunlight while the other part remained covered. A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state.
Helios 44-2 lens mounted on a Praktica MTL 5B Helios 44M-4 lens, 58mm f/2, in M42 screw mount Helios 40-2 Helios 81M 53mm f/2 lens mounted on Kiev 19. Helios (Russian: Ге́лиос) was a type of camera lenses, made in the USSR. They were usually supplied with Zenit cameras and thus usable with other M42 lens mount cameras such as the Pentax ...