I now own an F1, LA Olympics model, plus several lenses, the best a 24mm, a 100mm, and a 35-105 zoom. Unfortunately, I can't find a motor-winder, needed to use full automatic exposure. 6V battery, manual, semi-auto, auto exposures, VERY heavy camera, built to take abject abuse in the hottest desert, to the wettest rain-forest, to the cold of the Arctic. The titanium shutter-curtain makes a racket when winding on the film, but is rated at for 100,000 exposures. One of the finest cameras ever made.