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•When using the CAT System with the EF camera, the shutter speed dial must be set at" 125," the CAT

switch set to the " " position, and the aperture ring set at the 'A' mark. With all other types of flash, the switch may be left at its "NORMAL" position, but the aperture ring has to be set manually.

•At present, the CAT System may be used with four Canon lenses: two standard 50mm lenses, the f/1.4 and f/1.8 and two 35mm wide-angle lenses, the f/2 and f/3.5.

•Normal AE photography may be performed at any time when using the CAT System by returning the CAT switch to the "NORMAL" position.

•Two electronic flash units, one direct-mounting type inserted in the flash hot shoe and another using a PC cord plugged into the sync terminal, cannot be used simultaneously on the EF. When a PC cord is plugged into the sync terminal, the flash hot shoe is automatically disconnected.

•After using the CAT System for flash photography, turn the camera off and return the CAT switch to the "NORMAL" position. If you leave the switch

set to the position and turn the camera back on, the automatic exposure setting for your next flash shots will be incorrect.

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