Mamiya's interchangeable-lens 6x6 rangefinder — the 6MF, collapsing mount, leaf shutter, coupled RF, 1993.
The Mamiya 6MF is a medium-format rangefinder with interchangeable lenses, released in 1993 as a development of the Mamiya 6 system. The MF version added a multi-format capability for masking to alternative frame sizes while keeping the compact 6x6 rangefinder body with its collapsing lens mount.
This is an interchangeable-lens medium-format rangefinder taking the Mamiya 6 bayonet mount, shooting the square 6x6cm frame on 120 or 220 roll film. Each lens carries its own leaf shutter in the lens, and focusing is by coupled rangefinder through a bright-line finder. The lens mount collapses into the body to make the camera more compact for carrying, and the body has built-in metering with aperture-priority automatic exposure.
It is a field-portable medium-format rangefinder that folds flatter than an SLR, well suited to travel, landscape and street work where a square negative and a quiet leaf shutter are wanted. The interchangeable-lens system gives more flexibility than a fixed-lens rangefinder while keeping the compact handling that distinguishes the Mamiya 6 from bulkier medium-format SLRs.
When buying, check rangefinder patch contrast and alignment and test each lens's leaf shutter for accuracy across its speeds. Confirm the collapsing mount extends and locks correctly and that the meter and aperture-priority mode respond, since the body is battery-dependent. Inspect lenses for haze and fungus and check the light seals, film-advance and multi-format masking mechanism.