a field lens is
81Gravitational lens — Gravitational Lensing Formalism Strong lensing …
82Canon EF 1200mm lens — Infobox photographic lenses name = EF 1200mm f/5.6L USM caption = maker = Canon feat is = n feat usm = y feat sbf = feat macro = feat special = type = p application = Super Telephoto flength = 1200mm fov = aperture = f/5.6 f/32 groups = 10… …
83Depth-of-field adapter — A depth of field adapter (often shortened to DOF adapter) is used to achieve shallow depth of field on a video camera whose fixed lens or interchangeable lens selection is limited or economically prohibitive at providing such effect. A DOF… …
84Dark field microscopy — (dark ground microscopy) describes microscopy methods, in both light and electron microscopy, which exclude the unscattered beam from the image. As a result, the field around the specimen (i.e. where there is no specimen to scatter the beam) is… …
85Large format lens — Large format lenses are photographic optics that provide an image circle large enough to cover large format film or plates. Large format lenses are typically used in large format cameras and view cameras.Photographic optics generally project a… …
86Telecentric lens — A telecentric lens is a compound lens which has its entrance or exit pupil at infinity; in the prior case, this produces an orthographic view of the subject. This means that the chief rays (oblique rays which pass through the center of the… …
87Canon EF 135mm lens — EF 135mm f/2L USM= The Canon EF 135mm f/2L USM is a short or medium telephoto lens. The 135/2 is mainly used for portrait photography and for indoor sports, where the lighting is often poor. The fast f/|2|link=yes aperture makes the lens ideal… …
88Corrective lens — A bifocal corrective eyeglass lens A pair of contact le …
89Canon EF 28-300mm lens — Infobox Photographic lens name = EF 28 300mm f/3.5 5.6L IS USM caption = From left to right : 28 300mm f/3.5 5.6L IS USM, 70 200 f/2.8L IS USM, 300mm f/2.8L IS USM, 500mm f/4L IS USM maker = Canon feat is = y feat usm = y feat sbf = feat macro =… …
90Fisheye lens — In photography, a fisheye lens is a wide angle lens that takes in an extremely wide, hemispherical image. Originally developed for use in meteorology [Hill, R. 1924. A lens for whole sky photographs. Quarterly Journal of the Royal Meteorological… …
