Mamiya-Sekor Shift C 50mm f4 for Mamiya 645 brand_Wimberley The lowest few speeds are

The lowest few speeds are a touch slow

with only minor cosmetic wear and accurate shutter speeds

except you are the autofocus motor

The Kamlan 50mm f1

Mamiya-Sekor Shift C 50mm f4 for Mamiya 645 brand_Wimberley The lowest few speeds areThe Mamiya Sekor Shift C 50mm f4 is a wide angle shift lens for the Mamiya 645 camera system, with up to 16mm of movement depending on lens orientation. Smooth focus, good diaphragm. No haze or fungus, some dust; there are a few internal optical marks on the very edge of one element, possibly from original assembly; they won't affect imaging, but worth knowing. Cosmetic condition is excellent.