Nikon MB-D15  type_Accessories Canon TTL Hot Shoe Adapter

Canon TTL Hot Shoe Adapter 3 for off-camera TTL flash control using Canon’s corded off-camera TTL accessories

Honestly seems like a lot of engineering and manufacturing complexity for not a lot of payoff

just wear from use and handling

and it works on film and digital Nikon F-mount cameras (autofocus requires a camera with a built-in focusing motor

Nikon MB-D15 &nbsptype_Accessories Canon TTL Hot Shoe AdapterThe Nikon MB D15 is a vertical grip and battery holder for the Nikon D7100. It accommodates an extra EN EL3e battery with the included tray, or with appropriate carriers (not included) it'll take an EN EL4a or 6 AA batteries. This MB D15 is in very good cosmetic condition, with minor wear from normal use and handling.