back-focal distance
61eye, 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… …
62Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole …
63History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …
64earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …
65photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …
66Photography — is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light sensitive material such as photographic… …
67Corrective lens — A bifocal corrective eyeglass lens A pair of contact le …
68View camera — The view camera is a type of camera first developed in the era of the DaguerreotypeStroebel, L. D. (1986). View Camera Technique , 5th ed., p. 212. Boston: Focal Press. ISBN 0 240 51711 3] and still in use today, though with many refinements. It… …
69JERUSALEM — The entry is arranged according to the following outline: history name protohistory the bronze age david and first temple period second temple period the roman period byzantine jerusalem arab period crusader period mamluk period …
70Optical aberration — v · d · e Optical aberration …
