Olympus OM Zuiko Shift 35mm f2.8 brand_Argus The MB-23 uses 6 AA

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

The RF mode is a magnified image of the rangefinder only- basically an optical version of the Live View zoom mode on newer mirrorless cameras that makes accurate focusing easy

nothing more nefarious

The bad part is that the rear panel controls are just atrocious

Olympus OM Zuiko Shift 35mm f2.8 brand_Argus The MB-23 uses 6 AAThe Olympus OM Zuiko Shift 35mm f2. 8 is a very compact shift lens with approximately 2cm range on vertical and horizontal shifts, which is pretty respectable. Cosmetic and mechanical function are both excellent; there is very light internal haze which will not affect imaging. An unusual lens in good shape. Includes case.