aperture of screen
51Camera obscura — This article is about an optical device. For other uses, see Camera obscura (disambiguation) …
52Contax — II A historic camera: the East Germany Contax S of 1949 – …
53Environmental scanning electron microscope — Wool fibers imaged in an ESEM by the use of two symmetrical plastic scintillating backscattered electron detectors …
5435 mm film — is the basic film gauge most commonly used for both still photography and motion pictures, and remains relatively unchanged since its introduction in 1892 by William Dickson and Thomas Edison, using film stock supplied by George Eastman. The… …
55radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… …
56Nikon FE — with Nikkor 50mm f/1.4 lens Maker Nippon Kogaku K. K. Type 35mm film SLR Lens mount Nikon F lens mount …
57iPhone — This article is about the line of smartphones by Apple. For other uses, see iPhone (disambiguation). The iPhone 4S, the most recent generation of the iPhone iPhone models …
58Lens (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 …
59photography, history of — Introduction method of recording the image of an object through the action of light, or related radiation, on a light sensitive material. The word, derived from the Greek photos (“light”) and graphein (“to draw”), was first used in the… …
60Film speed — is the measure of a photographic film s sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system. A closely related ISO system is used to measure the sensitivity of digital… …
