Minolta A1 Camera Sensitivity ISO, Turn the function dial to the ISO position 1. Press

CAMERA SENSITIVITY - ISO

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	Five settings can be selected for camera sensitivity:
3	Auto, 100, 200, 400, and 800; the numerical values are
	based on an ISO equivalent. ISO is the standard used to
	indicate film sensitivity: the higher the number, the more
	sensitive the film.
	Turn the function dial to the ISO position (1). Press the
	function button in the center of the dial (2). Turn the front
	or rear control dials to change the camera sensitivity (3).
	Press the shutter-release button partway down or press
3	the function button to set the mode.

The auto setting automatically adjusts the camera sensitivity to the light conditions between ISO 100 and 200. When any other setting than auto is used, “ISO” will appear on the data panel, and “ISO” and the set value will be displayed on the monitors.

Photographers can select a specific sensitivity setting. Like grain in silver-halide film that increases with speed, noise increases with sensitivity in digital imaging; an ISO setting of 100 will have the least noise and 800 will have the most. A change in ISO also affects the flash range; the higher the ISO, the greater the range.

As the ISO value doubles, the camera sensitivity doubles; changing the ISO between 100 and 200, 200 and 400, or 400 and 800 changes the camera sensitivity by one stop or 1 Ev (p. 111). A change between 100 and 800 changes the camera sensitivity by a factor of 8 or three stops. High ISO set- tings (400, 800) will allow the photographer to hand hold the camera in low-light conditions without the need of a flash.

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