Mamiya-Sekor C 150mm f4 for Mamiya 645 brand_other sensor size is Super 16

sensor size is Super 16 for use with legacy 16mm motion picture lenses

as tempting as the small size might make that prospect

Typically only available in long rolls for movie cameras

6L IS USM is specced exactly like the non-L version: same aperture range

2" across (or anything else that needs a bit of magnifying)

Mamiya-Sekor C 150mm f4 for Mamiya 645 brand_other sensor size is Super 16The Mamiya Sekor C 150mm f4 is a good quality manual focus short telephoto lens for the Mamiya 645 system. Smooth focusing action, good diaphragm, and clean glass with only minor dust. Cosmetic condition is excellent, with minor wear from light use.