SMC Pentax 35mm f3.5 lens mount_Canon FD The MB-23 uses 6 AA

The MB-23 uses 6 AA batteries (not included) or a rechargeable battery pack (also not included)

3cm and 9cm lenses in addition to the standard Nikon 3

but it's a fraction the size of other lenses with similar specs- so there's reason to consider the tradeoff

Konica Hexar AR 28mm f3

SMC Pentax 35mm f3.5 lens mount_Canon FD The MB-23 uses 6 AAThe SMC Pentax 35mm f3. 5 lens is a compact wide angle lens lens for Pentax K mount SLR cameras. In excellent condition, with very minor cosmetic paint wear, minor internal dust, good function. This first series of Pentax K mount lenses is more heavily built than the later Pentax M lenses.