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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 ...
The amount of silver in the film stock was reduced. [6] [7] Tri-X also exists as a reversal film for the 16 mm and Super-8 cine film formats. The speed for tungsten lighting (3200 K) is ISO 160 and for daylight ISO 200 when processed as reversal. It can also be processed as a negative at a small loss of speed while the grain will be slightly ...
The film speed codes are in binary order if the first three bits (S1, S2, S3) are considered to identify a trio of film speeds and the last two bits (S4 and S5) are considered an adjustment of +0, + 1 ⁄ 3, or + 2 ⁄ 3 stops within that trio. For example, ISO speed 25/15° is encoded as 00010, while 32/16° is 00001 and 40/17° is 00011.
The camera has an ISO range of 25–400, as films faster than 400 were uncommon at the time and delivered reduced image quality. 25 speed allowed the use of Kodachrome, while 400 speed allowed use of Kodak Tri-X and similar fast materials under low light. Earlier models, from the first few years of production, have a maximum ISO speed of 200.
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.
In photography, reciprocity refers to the relationship whereby the total light energy – proportional to the total exposure, the product of the light intensity and exposure time, controlled by aperture and shutter speed, respectively – determines the effect of the light on the film. That is, an increase of brightness by a certain factor is ...
A cartridge of Kodak 35 mm (135) film for cameras. A film format is a technical definition of a set of standard characteristics regarding image capture on photographic film for still images or film stock for filmmaking. It can also apply to projected film, either slides or movies. The primary characteristic of a film format is its size and shape.
It has a metering range from EV –3.5 to +10 with a film speed range of ASA 25–12800. [ 5 ] : 3–5 When outside the metering range of the Booster T, the in-body meter is used instead. [ 5 ] : 18–19, 23 Just like the metering range was shifted towards the dark side, this finder also shifts the shutter speeds the camera provided towards the ...