The Nikon MD-4 is a professional motor drive designed for the Nikon F3 series cameras. It attaches directly to the camera body to provide automatic film advance and improved grip balance.

Film Advance: Automatic, up to 4 fps
Power Source: 8 × AA batteries (or MN-2 Ni-Cad pack)
Controls: Shutter release, rewind, power switch, and frame counter
Construction: Die-cast aluminum
Weight: Approx. 900 g (with batteries)