Olympus IS-1 manual Exposure, Automatic exposure mode, Program chart Standard photography mode

Exposure

Automatic exposure mode

Exposure refers to the amount of the light which strikes the film and is controlled by a combina- tion of aperture size and shutter speed. The

correct amount of the light, or correct exposure,

is controlled according to the film speed (indicated on the film package, such as ISO 100

or ISO 200).

Automatic exposure function automatically sets

the correct exposure. The IS-1 employs two types of automatic exposure modes: (1) programmed auto exposure, and (2) aperture- preferred auto exposure.

With programmed auto exposure, the camera automatically sets the most suitable combination of "F" stop and shutter speed for subjects with a certain brightness. It lets you concentrate on composing your shot and releasing the shutter at just the right time.

With aperture-preferred auto, you can select

any "F" stop by yourself, then according to that

aperture, the camera will automatically set the most appropriate shutter speed. Aperture - preferred auto allows greater manual control for more artistic freedom and expression.

Program chart (Standard photography mode)

The chart shown below is a program chart for

35 mm wide and 135 mm telephoto focal lengths. According to the focal length, the program itself changes. When the subject is bright, the "F" stop and shutter speed change simultaneously. When the subject is darker, the aperture opens fully and the shutter speed changes to the corresponding brightness.

In the standard photography mode (refer to

p.13), if the built-in flash has been popped-up it will automatically fire in dark situations. The shutter speed will be fixed at 1/100 second.

Shutter speed (second)	—— Flash OFF
	– – – Flash Fill-in

— 57 —