Canon manual 69

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EXPOSURE COMPENSATION	ject is not located in the central part of the
You can, of course, make exposure cor-	viewing screen.
rections by operating the camera manually,	Exposure Compensation Dial
but the A-1 is also equipped with other	One device for correcting exposure in the
devices which allow you to correct the	AE mode is the exposure compensation dial.
exposure while in an AE mode.	To make the correction, simply hold in the
Unusual lighting conditions which necessi-	exposure compensation lock button while
tate exposure correction include those in-	turning the outer knurled edge of the ASA
stances when light takes up the major part of	setting dial until the compensation dial
the viewing area, such as in beach or snow	index is aligned with the desired correction.
scenes, and contre-jour or backlit situations	The exposure compensation scale covers a
in which light is shining behind the subject,	full ±2 f/stop range in indications of 1/4
such as when your subject is in front of a	(underexposure by 2 f/stops), 1/2 (under-
window or when a lamp or the sun is shining	exposure by one f/stop), 1 (normal AE ex-
behind him/her. In such situations, the	posure), 2 (overexposure by one f/stop) and
camera might be fooled into giving a reading	4 (overexposure by two f/stops). The scale
which would underexpose your subject, so	is engraved in 1/3 f/stop increments so that
you must give it more exposure than the	intermediate settings may be used. The latter
camera shows in AE. This also applies to	may come in handy for bracketing the ex-
high-key or intentionally overexposed shots.	posure.
On the other hand, it is necessary to reduce	Since the digital readout is in only 1/2 f/stop
the exposure for a low-key shot. Some cor-	increments, depending on the situation, the

rection may also be necessary if your sub- –69–readout will not necessarily change to indi-