Canon manual 72

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Exposure Memory Switch

The A-1 also offers an exposure memory switch for correcting the exposure in the AE mode. Essentially, this switch assures correct exposure by exposing the picture for your subject no matter what the surroundings are. When you press in the exposure memory switch, it locks the exposure value (EV) for whatever you are metering. You can then compose the picture as you wish, and it will come out correctly exposed for whatever you metered. An extra advantage in this is that, depending upon whether you are in the shutter priority or aperture priority AE mode, you can change either one and the camera will automatically select the other to arrive at the same locked-in exposure value.

For instance, suppose you want to take a portrait of a subject against the sun. First move in closer to your subject until it is centered in and taking up about one-third of

the total viewing area. Push and hold in the exposure memory switch to lock the exposure value metered for your subject. Now step back and compose the picture as you like. Change the aperture or shutter speed, depending upon which priority you are in, if necessary. Continuing to hold in the exposure memory switch, press the shutter button. Your subject will be correctly exposed.

Of course, you have a problem if you cannot approach your subject to meter it directly. Then try to find an approachable subject which you think would give the same exposure value as your subject. Meter it, push in and hold the exposure memory switch. Compose your subject and shoot for correct exposure.

Please note that you must hold in the exposure memory switch until after you press the shutter button. It does not lock.

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