a field lens is
91Magnetic lens — …
92Sigma 30mm f/1.4 EX DC HSM lens — Infobox photographic lenses name = Sigma 30mm f/1.4 EX DC HSM maker = Sigma Corporation feat is = No feat usm = Yes (not available with Pentax and Sony mount) feat sbf = n feat macro = n application = interiors/portrait flength = 30 mm aperture …
93Depth of Field — F/A/V The amount of space within lens view which will maintain acceptable focus at given settings (i.e. camera speed, film speed, lens aperture). (Cinematography) HD Depth of field is a term which refers to the areas of a picture both in front… …
94Contact lens — Contacts redirects here. For the software application, see Address book. A pair of contact lenses, positioned with the concave side facing upward …
95Zoom lens — Nikkor 28 200 mm zoom lens, extended to 200 mm at left and collapsed to 28 mm focal length at right A zoom lens is a mechanical assembly of lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed… …
96Bright field microscopy — is the simplest of all the optical microscopy illumination techniques. Sample illumination is transmitted (i.e., illuminated from below and observed from above) white light. The most common use of the microscope involves the use of an organism… …
97depth of field — the range of distances of the object in front of a camera lens or other image forming device measured along the axis of the device throughout which the image has acceptable sharpness * * * Optics, Photog. the range of distances along the axis of… …
98Fresnel lens — A Fresnel lens (pronounced [ frɛz.nəl] or [freɪ nɛl] ) is a type of lens invented by French physicist Augustin Jean Fresnel. Originally developed for lighthouses, the design enables the construction of lenses of large aperture and short focal… …
99Wide-angle lens — In photography and cinematography, a wide angle lens is a lens whose focal length is substantially shorter than the focal length of a normal lens for the image size produced by the camera, whether this is dictated by the dimensions of the image… …
100Double-Gauss lens — The double Gauss design with optical ray traces The double Gauss lens is a compound lens used mostly in camera lenses that reduces optical aberrations over a large focal plane. Contents 1 Design …
