diaphragm mirror
21Catadioptric system — A 150 mm aperture catadioptric telescope (Maksutov) A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric… …
22Zenit (camera) — This article is about the Russian camera brand. For the astronomic or geodetic instruments directed to the zenith, see Zenith camera. : For other uses, see Zenit (disambiguation). Zenit is a Russian (and formerly Soviet) camera brand manufactured …
23Perspective control lens — (a) Keeping the camera level, with an ordinary lens, captures only the bottom portion of the building. (b) Tilting the camera upwa …
24eye, human — ▪ anatomy Introduction specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit The eye is protected from mechanical injury… …
25motion-picture technology — Introduction the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… …
26Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after …
27Canon T90 — The Canon T90, introduced in 1986, was the top of the line in Canon s T series of 35 mm Single lens reflex (SLR) cameras. It was the last professional level manual focus camera from Canon, and the last professional camera to use the Canon FD lens …
28Minolta AF 500mm Reflex lens — Minolta 500mm f/8 Reflex Key features Maker: Minolta, Sony Ultrasonic motor:  No Macro capable …
29Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn …
30Nikon F — Type 35 mm SLR camera Lens mount Nikon F mount Focus manual Exposure manual …
