focal distance (
71focallength — focal length n. Abbr. f The distance from the surface of a lens or mirror to its focal point. Also called focal distance, focus. * * * …
72focaldistance — focal distance n. Abbr. FD See focal length. * * * …
73РАССТОЯНИЕ ФОКАЛЬНОЕ ГЛАЗА — (focal distance) расстояние между хрусталиком и точкой позади хрусталика, в которой сходятся лучи света при рассмотрении отдаленного предмета. У человека с хорошим зрением эта точка находится на сетчатке глаза; у людей, страдающих миопией… …
74f-number — focal distance divided by the effective diameter of the camera lens aperture (Photography) …
75photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
76Optics — For the book by Sir Isaac Newton, see Opticks. Optical redirects here. For the musical artist, see Optical (artist). Optics includes study of dispersion of light. Optics is the branch of …
77Circle of confusion — For the closely related topic in microscopy, see Point spread function. In optics, a circle of confusion is an optical spot caused by a cone of light rays from a lens not coming to a perfect focus when imaging a point source. It is also known as… …
78Canon EF lens mount — The EF lens mount allows all the Canon EF lenses to be used on any of the Canon EOS line of cameras made by Canon Inc.Unlike the EF s breech lock predecessor, the FD mount, the EF mount uses a bayonet style mount. EF stands for Electro Focus :… …
79Eyeglass prescription — Using a phoropter to determine a prescription for eyeglasses An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist or ophthalmologist, that specifies the value of all parameters the prescriber has deemed… …
80Micro Four Thirds system — The Micro Four Thirds system (MFT) is a standard created by Olympus and Panasonic, and announced on August 5, 2008,[1] for mirrorless interchangeable lens digital cameras and camcorders[2] design and development. However, unlike the preceding… …
