Nikon F3 - Manual (Page 56)

Motor Drive
One of the most exciting new accessories for the F3 is the
MD-4 Motor Drive. This amazingly compact and stream­
lined unit attaches to the bottom of the camera in seconds
and advances the film either singly or in seguence form
up to a rapid 6 * frames per second—making it the fastest
regular production motor drive on the market today.
Actual controls have been reduced to only those neces­
sary for convenient operation. In addition to the electro­
magnetic trigger button (which also turns on the camera's
meter when depressed halfway), there is its concentric
S-C (SINGLE/CONTINUOUS) mode selector, a battery
check button and LED indicators, two interlocking re­
wind slides for automatic film rewinding, and a sub­
tractive frame counter which stops the motor at the
desired number of frames for use in cold weather. Eight
AA-type penlight batteries fit into a quick-release clip
housed in the base of the motor drive. An optional NiCd
battery pack is available for use in cold weather or when
you want the fastest possible firing rate. Once you attach
the MD-4 to your camera, you'll never want to take it off.
• Possible with NiCd battery pack at 1/225 sec. or above with mirror
locked-up.