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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
While twin-lens reflex cameras have been more numerous in the medium format film category, many medium-format SLRs had been (and some still are) produced. Hasselblad of Sweden has one of the best-known camera systems utilizing 120 and 220 film to produce 6 cm × 6 cm (2 1 ⁄ 4" × 2 1 ⁄ 4") negatives. They also produce other film backs which ...
The first widely-available fisheye lens for 35mm cameras was the Fisheye-Nikkor 8 mm f /8 from Nikon, released in 1962, which produced circular images similar to those popularized by the LIFE photographers; that lens served as the "eye" of the HAL 9000 computer from the film 2001: A Space Odyssey, although scenes depicting HAL's point of view ...
This list of motion picture film formats catalogues formats developed for shooting or viewing motion pictures, ranging from the Chronophotographe format from 1888, to mid-20th century formats such as the 1953 CinemaScope format, to more recent formats such as the 1992 IMAX HD format. To be included in this list, the formats must all have been ...
1955. 1974. 10 × 14 mm (original) 13 × 17 mm (later) 20. Minolta, 16 mm stock, originally double perforated (single perforated or unperforated film could be loaded), later single perf to allow larger 13 × 17 mm image. ^ Unless otherwise noted, all formats were introduced by Kodak, which began allocating the number series in 1913.
Technicolor process or format: several custom imaging systems used in film production, culminating in the "three-strip" process in 1932 (1917–1955). Technicolor IB printing ("IB" abbreviates " imbibition ", a dye-transfer operation): a process for making color motion picture prints that allows the use of dyes that are more stable and ...
Stereo photography techniques. Stereo photography techniques are methods to produce stereoscopic images, videos and films. This is done with a variety of equipment including special built stereo cameras, single cameras with or without special attachments, and paired cameras. This involves traditional film cameras as well as, tape and modern ...
The prism cover test ( PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]