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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 ...
Popular exposure chart type, showing exposure values EV (red lines) as combinations of aperture and shutter speed values. The green lines are sample program lines, by which a digital camera automatically selects both the shutter speed and the aperture for given exposure value (brightness of light), when set to Program mode (P). (Canon, n.d.)
Eastman Double-X Negative Film 5222 / 7222 motion picture film. Medium-speed panchromatic negative film: USA: 135-24 FPP: Svema FN64: available P 64 B&W Print Panchromatic black and white negative film with spectral sensitivity that extends into near infrared (up to 750 nm). Same as 'Dracula.' Ukraine 135-24 FPP: Svema Foto 100: available P 100 ...
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.
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 ...
On a sunny day at ISO 100 ("100 speed film"), the aperture is set to f /16 and the shutter speed (i.e. exposure time) to 1 / 100 or 1 / 125 [2] seconds (on some cameras 1 / 125 second is the closest available setting to 1 / 100 second). On a sunny day at ISO 200 and aperture at f /16, set shutter speed to 1 / ...
The effective speed of a digital camera can be adjusted at any time, while the film must be changed in a film camera to change the speed. [citation needed] However, film is available in much lower film speeds than digital which rarely drop below ISO's of 100 or 400, a number of both colour and black & white films are sold with ISO of 50, this ...
roll film 1902 1941 1 + 5 ⁄ 8 × 2 + 1 ⁄ 2 in 122 roll film 1903 1971 3 + 1 ⁄ 4 × 5 + 1 ⁄ 2 in 82.55 × 139.7 mm 6 or 10 Postcard format 123 roll film 1904 1949 4 × 5 in 101.6 × 127 mm 124 roll film 1905 1961 3 + 1 ⁄ 4 × 4 + 1 ⁄ 4 in 82.55 × 107.95 mm 3.716-inch spool: same picture size as 118 with longer spool 125 roll film 1905