Operating Instructions

Loading the Mercury Batteries

Since the Canon EF's Variable Aperture AE control

and the electronic control of slow shutter speeds

depend on battery power for their operation, two

1.3 volt mercury batteries (Mallory PX 625 or

Eveready EPX 625) must be loaded into the battery

compartments located in the bottom of the camera.

Turn the camera upside down and unscrew both

battery compartment covers with a coin. Load one

battery into each compartment making certain that

the "+" side of the battery is up. Then replace both

covers and screw them back on tightly.

• To insure good electrical contact, clean both

surfaces of each mercury battery with a clean dry

cloth and handle each by its edges only.

• Be careful to load the batteries properly.

Improper loading (with the "–" side up) might cause

damage to the camera's electrical circuits.

• If the camera will not be used for a long period of

time, the batteries should be taken out of the

battery compartments to prevent possible damage to

the terminals from battery corrosion.

• PX-13 type mercury batteries are not recom-

mended because of their low temperature charac-

teristics.

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BASIC OPERATION