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V BASIC OPERATION

A 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

1.3volt 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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