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The ASA scale is a linear scale, that is, a film denoted as having a film speed of 200 ASA is twice as fast as a film with 100 ASA. The ASA standard underwent a major revision in 1960 with ASA PH2.5-1960, when the method to determine film speed was refined and previously applied safety factors against under-exposure were abandoned, effectively ...
Tri-X is a black and white photographic film produced by the Eastman Kodak Company. Since 2013, it is distributed by Kodak Alaris which controls the Kodak Professional product line under which it is grouped. [1] The combination of hand-held cameras and high-speed Tri-X film was transformative for photojournalism [2] and for cinema. [3]
35 mm film is a film gauge used in filmmaking, and the film standard. [1] In motion pictures that record on film, 35 mm is the most commonly used gauge. The name of the gauge is not a direct measurement, and refers to the nominal width of the 35 mm format photographic film, which consists of strips 1.377 ± 0.001 inches (34.976 ± 0.025 mm) wide.
The first DX encoded film to be released was the color print film Kodacolor VR 1000 in March 1983. The first point-and-shoot cameras to use DX encoding to automatically set film speed were released in 1984, including the Pentax Super Sport 35 / PC 35AF-M [ 5 ] and Minolta AF-E / Freedom II. [ 6 ]
Silent film has no standard speed; many amateur formats have several common speeds, but no standard. Negative lenses indicates whether spherical (normal) or anamorphic lenses are used on the original camera negative, and if anamorphic lenses, what anamorphic power is used. Projection gauge is the film gauge (width) used for the release print.
Film is commonly checked for broken sprocket holes before presentation, a process known as "spooling". Mechanical devices exist for this purpose, but the classic method is to place the finger and thumb of a gloved hand on the edges of the film, which is mounted on a winding bench, and to slowly run the film through the fingers, feeling for snags.
Within a normal exposure range for film stock, for example, the reciprocity law states that the film response will be determined by the total exposure, defined as intensity × time. Therefore, the same response (for example, the optical density of the developed film) can result from reducing duration and increasing light intensity, and vice versa.
One foot of standard 35mm film contains 16 frames, and a standard recording speed is 24 frames per second, or 1.5 feet per second; a 90-minute feature film shot in this way on conventional film stock is therefore equivalent to more than a mile and a half of footage. [31] found footage (film technique) fourth wall frame