Canon DR-E4 coupler variable unless I slept through a

unless I slept through a couple of pretty important world history classes

The image shown here is a press shot from Cotton Carrier

The Cosmicar/Pentax TV Lens 25mm f1

This OM-1 is in excellent cosmetic condition

Canon DR-E4 coupler variable unless I slept through aThe DR E4 is a coupler that allows you to connect an AC E4 power adapter (not included) to a Canon EOS 1Ds Mark III, 1D Mark III, 1D Mark IV, or 1D X (also not included.) Please note: this is the coupler unit only. You will also need to source an AC E4 power adapter to make use of this item. It will not do anything without an AC E4 except give your camera a tail.