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BASIC OPERATION

B Checking the Batteries

After loading the batteries, you should check their power level. This is a simple procedure on the EF. Just hold the red battery check button on the bottom of the camera in for two or three seconds. Watch the LED on the top of the camera. If the LED blinks on and off rapidly, then the power level of the batteries is sufficient. If the LED blinks only once or does not blink at all, then the power level is insufficient. If this is the case, replace both batteries with two new ones of the same type.

•Since the Canon EF relies heavily on battery power for its operation, check the batteries each time you plan to use the camera and carry spare batteries with you at all times in case of battery failure. Attach the small battery case to the camera strap and carry extra batteries in it.

•If the batteries do fail, the EF can still be used manually from 1/2–1/1000 sec. The Variable Aper- ture AE control will not operate, but you can manually adjust the aperture ring of the lens. A basic exposure guide to follow for bright sunlight (with distinct shadows) is to make a fraction representing the shutter speed needed at f/16 by putting a "one" over the film's ASA rating. With a film of ASA 100, use 1/100 sec. at f/16. Choose the nearest click-stop

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