mirror lens
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Mirror cut-off — is a term used in photography for a problem that can occur within a reflex camera. This occurs when the mirror in the camera is smaller than the focusing screen and using long (telephoto) lenses. When light exits a non telephoto lens, the light… … Wikipedia
Lens sag — is a problem that sometimes afflicts very large refracting telescopes. It is the equivalent of mirror sag in reflecting telescopes. It occurs when the physical weight of the glass causes a distortion in the shape of the lens because the lens can… … Wikipedia
Mirror Mirror: a history of the human love affair with reflection — is a 2003 nonfiction book written by American investigative journalist Mark Pendergrast. It was widely reviewed.[1][2] ISBN: 0 465 05470 6 (404 pages) Synopsis Pendergrast attempts to cover the history of mirrors and other reflective, refractive… … Wikipedia
mirror image — n something that has its parts reversely arranged in comparison with another similar thing or that is reversed with reference to an intervening axis or plane * * * 1. the image of light made visible by the reflecting surface of the cornea and… … Medical dictionary
Mirror lock-up — With mirror lock up the mirror (2) flips up towards (5) well before the shutter (3) opens. As a result light no longer reaches the eyepiece (8). Mirror lock up (often abbreviated to MLU) is a feature employed in many Single Lens Reflex (SLR)… … Wikipedia
Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra … Wikipedia
Lens mount — A lens mount is an interface mechanical and often also electrical between a photographic camera body and a lens. It is confined to cameras where the body allows interchangeable lenses, most usually the single lens reflex type or any movie camera… … Wikipedia
Mirror mount — This article is about the general subject. For mirror mounts specific to primary telescope mirrors, see Mirror support cell. Two kinematic mirror mounts, with mirrors. A mirror mount is a device that holds a mirror. In optics research, these can… … Wikipedia
lens — 01. The [lens] fell out of my new sunglasses, so I got my money back. 02. Nowadays, many people with poor eyesight can have their vision restored through corrective [lens] surgery using a laser beam. 03. I scratched the [lens] of my sunglasses… … Grammatical examples in English
lens — Physically essential to sight, a transparent tissue that bends light passing through the eye. To focus light, the lens can change shape by bending. Also, a transparent piece of glass or another material, which is shaped to focus the passage of … Glossary of Art Terms
mirror area — the reflecting surface of the cornea and lens when illuminated through the slit lamp … Medical dictionary
