Canon manual 55

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is set for flash photography while “buLb” replaces the shutter speed data when the AT dial shutter speed scale is set to “B”. “M” is also displayed at the “B” setting. The flashing “EEEE EE” appears to warn of error in the stopping-down process and will be explained in more detail later in this instruction booklet.

When switching from one priority to another under the same exposure conditions, it is possible that the new camera-selected variable will differ a half step from the corresponding previously manually-selected value. For instance, a combination of 1/250 sec. and f/5.6 in the shutter priority AE mode may become 1/180 sec. at f/5.6 in the aperture priority AE mode under the same conditions. This is due to the fact that the camera-selected value is rounded off to half steps in the display. However, since the camera actually controls its variable stepless- ly, this seeming discrepancy will have no effect upon exposure.

Incorrect Exposure Warnings

The types of incorrect exposure warnings depend on what AE mode you are using.

1. In shutter priority AE mode

When exposure is incorrect, the LED digital readout for aperture flashes on and off.

Underexposure

Usually the digital readout for aperture

flashes showing the lens maximum aperture to indicate underexposure. At very low shutter speeds, it is possible for a different exposure, turn the AT dial to as lower shutter speed.

Overexposure

Whenever any aperture smaller than f/16 (that is, 19 to 32) appears in the readout, it will always be flashing on and off. Whether or not this indicates overexposure depends on the lens minimum aperture. If the minimum aperture of the lens is equal to or smaller than the flashing aperture, exposure will be correct. If the lens minimum aperture is larger than the flashing aperture, increase the shutter speed for correct ex- posure.

There is one exception to the above which occurs when the minimum aperture of the lens is f/32. Since f/32 is the smallest aperture which can appear in the readout, it is not immediately apparent whether exposure is correct or not. To find out, increase the shutter speed until the readout shows a flashing f/22. At that point, you may reduce the shutter speed one step for correct exposure at f/32.

There is a rare case where f/16 may flash on and off in the viewfinder. If you are using a lens with an f/16 minimum aperture, the image may be overexposed, so increase the

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