Leica's half-frame Barnack — the 72, 18x24mm frames, coupled RF, cloth shutter, 1954.
The Leica 72 was a rare half-frame screw-mount Barnack body introduced around 1954, shooting 18x24mm frames to yield about 72 exposures from a standard 36-exposure film load. It was produced in small numbers, some at the Leitz Midland plant in Canada, and is a scarce collector item.
It is a 35mm coupled-rangefinder camera taking 39mm screw-thread lenses but exposing the smaller half-frame 18x24mm format, based on the IIIf-type mechanism with a horizontal cloth focal-plane shutter and slow speeds. The finder is masked for the vertical half-frame format, there is no built-in meter, and the shutter is fully mechanical and battery-free.
It suits collectors and photographers interested in the half-frame Barnack format for high frame counts and economical shooting. The vertical half-frame framing and doubled exposure count change the shooting rhythm compared with a standard full-frame screw Leica.
Because it is rare, verify originality and the half-frame masking carefully, as conversions and fakes exist. Check rangefinder patch contrast and alignment, test slow speeds, and inspect the cloth curtains for pinholes and capping. Confirm the half-frame finder mask is intact and the film transport is smooth.