The Canon Flash Coupler L lets you mount a standard hot shoe flash to the original Canon F-1 camera, and it also includes a little illuminator to light up your viewfinder display. The coupling function doesn’t require any battery power, but the illuminator does: originally designed to accommodate a PX1 and a PX625 battery, you’ll need to figure out how to put about 3v through the circuit to make it light up. It does light up, though!

Please note: this accessory is compatible with the Canon F-1 and F-1N, not the New F-1.