How the photograph turns out is controlled by several factors, i.e., the intensity of the light; the sensitivity of the film; and the duration for which the film is exposed to the light. These factors all relate to each other, and thus determine if the film will be too bright, to dark, over or under-exposed.

The first of these settings is ASA or ISO. This is the speed of the film and determines its sensitivity. For proper exposure, the ASA should always be set to the speed of the film that you are using, e.g., 400 (standard). ASA stands for American Standards Authority, and ISO stands for International Standards Organisation. Th

The third essential element of a correct exposure is the shutter speed. This is the factor that controls the duration for which the film is exposed to the light. It can range from one thousandth of a second, to a second, to B, bulb, meaning a manual duration. Lower shutter speeds allow more light in to the film and are needed for darker situations. Lower shutter speeds can also be used to catch movement on camera, showing up in blurs. Higher speeds freeze the image, and are used for the likes of sports photography. Because of the camera’s sensitivity to movement at lower shutter speeds, it is difficult to take a shot below one sixtieth of a second without getting some camera shake. Therefor it is recommended that shots below this speed are taken using a tripod.

ese are the scales on which the films are graded. The highest grade on this scale is 3200, this being rarely used. The grain of the resulting image is effected

Some topics in this essay:
Shutter Speed, Films ISO, , Standards Organisation, ASA ISO, shutter speed, lower shutter, lower shutter speeds, shutter speeds, Authority ISO, aperture shutter speed, film exposed light, duration film exposed, speed film, intensity light, duration film, exposed light, amount light, correct exposure, light aperture,