Definition: The relative index, also called ISO, of how much light a film requires to be properly exposed. A 100 ISO film requires four times the light of a 400 ISO (speed) film for correct exposure. Rule of thumb Definition[ Dull day-high speed, bright day-low speed
Definition: see Speed.
Definition: A film's sensitivity to light, rated numerically so that it can be match to the camera's exposure control. Film speed ratings increase as the sensitivity of the film increases. Each time you double the film speed, half as much light is needed for correct exposure. Faster films need less light but they produce grainier pictures. Slower films have a finer grain and they produce more contrast. Pictures taken on slower films are sharper in appearance.
Definition: The sensitivity of a given film to light, indicated by a number such as ISO 200. The higher the number, the more sensitive or faster the film. Note: ISO stands for International Standards Organization.
Definition: A film's sensitivity to light, rated numerically so that it can be matched to the camera's exposure controls. Film speed ratings increase as the sensitivity of the film increases. The two most commonly used scales, ASA (American Standards Association) and DIN (Deutsche Industrie Norm), are now superseded by the system known as ISO (International Standards Organization). ASA 100 (21° DIN) is expressed as ISO 100/21°or simply lSO 100.
Definition: see Speed.
Definition: A film's sensitivity to light, rated numerically so that it can be match to the camera's exposure control. Film speed ratings increase as the sensitivity of the film increases. Each time you double the film speed, half as much light is needed for correct exposure. Faster films need less light but they produce grainier pictures. Slower films have a finer grain and they produce more contrast. Pictures taken on slower films are sharper in appearance.
Definition: The sensitivity of a given film to light, indicated by a number such as ISO 200. The higher the number, the more sensitive or faster the film. Note: ISO stands for International Standards Organization.
Definition: A film's sensitivity to light, rated numerically so that it can be matched to the camera's exposure controls. Film speed ratings increase as the sensitivity of the film increases. The two most commonly used scales, ASA (American Standards Association) and DIN (Deutsche Industrie Norm), are now superseded by the system known as ISO (International Standards Organization). ASA 100 (21° DIN) is expressed as ISO 100/21°or simply lSO 100.
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