Search results
Results from the WOW.Com Content Network
Sunlit subject shot on a digital camera set to ISO 100, exposed at f/8 at 1/400 second which is the same exposure value as f/16 for 1/100 second, the recommended "sunny 16" exposure In photography, the sunny 16 rule (also known as the sunny f /16 rule ) is a method of estimating correct daylight exposures without a light meter .
Film speed is used in the exposure equations to find the appropriate exposure parameters. Four variables are available to the photographer to obtain the desired effect: lighting, film speed, f-number (aperture size), and shutter speed (exposure time). The equation may be expressed as ratios, or, by taking the logarithm (base 2) of both sides ...
To photograph outdoor night sports with an ISO 400–speed imaging medium, search Table 2 for "Night sports" (which has an EV of 9 for ISO 100), and add 2 to get EV 400 = 11. For lower ISO speed, decrease the exposure values (increase the exposures) by the number of exposure steps by which the speed is less than ISO 100.
DX CAS code positions; this film is rated at ISO 400/27°, has a 24-exposure length, and an exposure tolerance of ±1 stops. 1: Ground; 2–6: Film speed; 7: Ground; 8–10: Film length; 11–12: Exposure latitude; The outside of film cartridges are marked with a DX Camera Auto Sensing (CAS) code readable by many cameras.
For photographic film, sensitivity is referred to as film speed and is measured on a scale published by the International Organization for Standardization (ISO). Faster film, that is, film with a higher ISO rating, requires less exposure to make a readable image. Digital cameras usually have variable ISO settings that provide additional ...
Tri-X 400 is the more common of the two, available in 24- and 36-exposure rolls of 35 mm and rolls of 120 as well as 50 and 100 ft bulk rolls of 35 mm. Tri-X 320 is available in 4×5", 5×7", and 8×10" sheets. Tri-X 400 is usually rated at ISO 400 when processed in standard developers and remains among the fastest black and white films today.
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 ...
For example, an EV of 10 may be achieved with an aperture of f / 2.8 and a shutter speed of 1/125 s. The same exposure is achieved by doubling the aperture area to f / 2 and halving the exposure time to 1/250 s, or by halving the aperture area to f / 4 and doubling the exposure time to 1/60 s; in each case the response of the film is expected ...