Exposure Metering
The camera provides automatic exposure metering in aperture priority auto-exposure or programmed exposure modes (with AE lock and +/-2EV exposure compensation) or exposure can be manually set (with exposure metering still available). Light is metered through a sensor on the front of the camera body rather than using TTL metering or a sensor inside the filter ring. This means that manual camera settings (ISO value or exposure compensation) must be used to account for light reduction due to any filter fitted.
Exposure modes are selected via the four-position power/mode switch as follows:
- off the camera is switched off
- P Program AE (auto-exposure) mode. Exposure is set by calculating the correct shutter speed for the given lighting, film sensitivity and currently-selected aperture. If the calculated shutter speed is higher than the maximum available (1/250th of a second) the aperture is closed to expose with an achievable shutter speed value. If the calculated shutter speed is lower than the "camera shake" shutter speed (default 1/30 of a second, but variable from 1/4 to 1/60) the aperture is opened to expose with that shutter speed.
- A Aperture priority AE mode. Exposure is set by calculating the correct shutter speed or the given lighting, film sensitivity and currently-selected aperture. If that shutter speed is not available the photo is taken with the closest available shutter speed, but the aperture value is not varied.
- M Manual exposure mode. Exposure is set by the user indicating the aperture value via the aperture dial and the shutter speed via push-buttons on the camera top plate. Half-pressing the shutter release will set the shutter speed value to the correct value as calculated by the camera's metering system, which the user can then vary.
A self-timer button, also on the camera's top plate, can be used to trigger an exposure with a time delay of approximately 10 seconds (cancelable).
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