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Manual Override

You may have occasion to wish to cancel the A-1's AE capabilities to control exposure, both aperture and shutter speed, by your- self. This will be the case if you are using a separate exposure meter, if you wish to correct exposure in unusual lighting conditions or in flash photography, or if you want to control exposure for creative ef- fects.

With the A-1, this is a simple process. Using an FD lens, first disengage the aperture ring from the “A” mark. Set the AE mode selector to TV. The Av setting is useless. Set the aperture by turning the lens aperture ring, and set the shutter speed by turning the AT dial. When you press the exposure preview switch or the shutter button halfway to preview the exposure, the data displayed in the viewfinder will be the same as if the camera was in shutter priority AE.

You will see the shutter speed you have set on the AT dial. The aperture displayed is that that the camera would select on Auto. Although the aperture you have manually set on the aperture ring is not displayed, it is at that aperture that your picture will be exposed when you press the shutter button. You will also see the red “M” inside the viewfinder to indicate that you are in the manual mode.

To operate the camera manually using an FL lens or any other lens without a full aperture signal pin, set the AE mode selector to TV. With these lenses you must always set the aperture by turning the lens aperture ring. In the case of these lenses, the digital readout is unreliable, and it is better to cut it out altogether by switching off the viewfinder display lever. You must rely on your own experience for setting the exposure.

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