Pentax M42 Body Cap
USCamera PX640 Battery Adapter
USCamera MR-9 battery adapter lets you use a common A76 or S76 1.5 volt battery in your Fujica, Minolta, Olympus, Yashica, and other cameras plus rifle scopes that use discontinued mercury batteries. Includes a A76 battery. Please note. Some but not all cameras may require adjustments/modifications to the metering circuit for the meter to maintain exposure accuracy when using this adapter. Made by USCamera China.