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A zoom lens is a system of camera lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed-focal-length (FFL) lens ( prime lens ). A true zoom lens or optical zoom lens is a type of parfocal lens, one that maintains focus when its focal length changes. [1] Most consumer zoom lenses do not maintain ...
Zoomar Lens. 1959 Voigtländer Bessamatic, fitted with DKL-mount Zoomar lens (36~82 mm, f/2.8 ), first production zoom lens for still photography. The Zoomar lens was the first commercially successful zoom lens, designed by optical engineer Frank G. Back as an outgrowth of his research on viewfinders and variable focal length projectors for the ...
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] They are called standard zoom lenses, because the ...
They began breaking new ground around 1960: the Nippon Kogaku Auto-Nikkor 8.5–25 cm f/4-4.5 (1959), for the Nikon F, was the first telephoto zoom lens for 35mm still cameras (and second zoom after the Zoomar), the Canon 50mm f/0.95 (1961), for the Canon 7 35mm RF, with its superwide aperture, was the first Japanese lens a photographer might ...
A collection of lenses a DSLR owner might have: 50mm F1.4, 17-40mm F4, 100mm F2.8 Macro, 24-70mm F2.8, 70-200mm F2.8. This article details lenses for single-lens reflex and digital single-lens reflex cameras (SLRs and DSLRs respectively). The emphasis is on modern lenses for 35 mm film SLRs and for "full-frame" DSLRs with sensor sizes less than ...
Zoom lenses: Wide-angle and special purpose zoom lenses. Minolta AF Macro Zoom 3×-1× f / 1.7-2.8: 2594-116, 2594-616 25941: Zoom 35mm 5-pin 46mm No No No 1990 3:1 max.; white finish; also available as calibrated version in conjunction with Minolta CS-1000S spectroradiometer. Konica Minolta AF Zoom DT 11-18mm f / 4.5-5.6 (D) 2698-110 41 Zoom ...
A zoom lens, a system of camera lens elements for which the focal length and angle of view can be varied. Size ratio (optical magnification) Optical magnification is the ratio between the apparent size of an object (or its size in an image) and its true size, and thus it is a dimensionless number.
Superzoom. A superzoom or ultrazoom lens is a type of photographic zoom lens with unconventionally large focal length factors, typically ranging from wide angle to extreme long lens focal lengths in one lens. [1] [2] There is no clear definition of a superzoom lens, but the name generally covers lenses that have a range well above the 3× or 4 ...