Canon DR-E4 coupler variable the B60 side provides both

the B60 side provides both inner and outer B60 bayonets for maximum flexibility

with good speeds

This one's in good cosmetic condition overall

Lens has an accurate shutter and good diaphragm

and there is some truly epic pincushion distortion going on here

Canon DR-E4 coupler variable the B60 side provides bothThe 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.