Olympus IS-1 Instructions Manual

ExposureAutomatic exposure modeExposure refers to the amount of the light whichstrikes the film and is controlled by a combina-tion of aperture size and shutter speed. Thecorrect amount of the light, or correct exposure,is controlled according to the film speed(indicated on the film package, such as ISO 100or ISO 200).Automatic exposure function automatically setsthe correct exposure. The IS-1 employs twotypes of automatic exposure modes: (1)programmed auto exposure, and (2) aperture-preferred auto exposure.With programmed auto exposure, the cameraautomatically sets the most suitable combinationof "F" stop and shutter speed for subjects with acertain brightness. It lets you concentrate oncomposing your shot and releasing the shutterat just the right time.With aperture-preferred auto, you can selectany "F" stop by yourself, then according to thataperture, the camera will automatically set themost appropriate shutter speed. Aperture -preferred auto allows greater manual control formore artistic freedom and expression.Program chart (Standard photography mode)The chart shown below is a program chart for35 mm wide and 135 mm telephoto focal lengths.According to the focal length, the program itselfchanges. When the subject is bright, the "F" stopand shutter speed change simultaneously. Whenthe subject is darker, the aperture opens fully andthe shutter speed changes to the correspondingbrightness.In the standard photography mode (refer top. 13), if the built-in flash has been popped-upit will automatically fire in dark situations. Theshutter speed will be fixed at 1/100 second.Shutter speed (second) —— Flash OFF– – – Flash Fill-in— 57 —