DO NOT ATTEMPT TO USE THIS FLASH ON THE CAMERA OR TEHTER BY WIRE. THe voltage will destroy at least the built-in flash function of your camera. either use a radio slave, an optical slave or you can use it on camera if you use a WEIN safe-synch (approx. $70 USD). If you do not have the users guide for the flash, it can be GOOGLED. Search for "VIVITAR 285 users guide"
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