Mamiya RB67 Professional with Mamiya-Sekor C 90mm f3.8 brand_Metabones thumbscrew (with standard 1/4" thread)

thumbscrew (with standard 1/4" thread) for camera mounting

It expands when you turn the camera on

except from the original factories

though it does not have a front filter thread- so your usual lens caps won't fit on this filter

Mamiya RB67 Professional with Mamiya-Sekor C 90mm f3.8 brand_Metabones thumbscrew (with standard 1/4" thread)The Mamiya RB67 is a big, heavy camera no way around that. But it has a number of unique capabilities that make it worth hauling around: it shoots in the convenient 6x7 image format, which is the correct proportion to print a traditional 8x10 image without cropping; it has a tremendous built in extension, for near macro shots with nearly any lens; the rotating back lets you shoot vertical or horizontal without rotating the whole camera; and it's fully