Nikonites
Nikon F2AS Review (6)

28/06/11
Shown illustrated is the Nikon F2AS with motor- drive, 250 exposure back together with two MZ-1 film cassettes required for the 33 feet of 35mm film. Nikon also produced a 250 exposure film loader, this could be used to measure out the required number of exposures in increments of 50. This was a darkroom loader only, and unlike some bulk film cassette models, could not be used in daylight.(I'm going to load up some film, so I'll let you know how I got on?)