Leica's flash-sync coupled-RF body — the IIf, no slow speeds, 39mm screw, cloth shutter, 1951.
The Leica IIf was a post-war coupled-rangefinder screw Leica introduced in 1951, adding flash synchronisation to the IIc formula. It sat in the f-series alongside the flash-synced If and IIIf and lacked the slow speeds of the III bodies.
It is a 35mm coupled-rangefinder camera taking 39mm screw-thread lenses, with a horizontal-travel cloth focal-plane shutter, flash sync, and no slow-speed dial. Focusing and framing use separate rangefinder and viewfinder windows, there is no built-in meter, and the shutter is fully mechanical and battery-free.
It suits collectors and photographers who want a coupled-rangefinder Barnack with flash sync for daylight and flash work without the complexity of slow speeds. Handling follows earlier screw Leicas with the familiar two-window focus-and-frame workflow.
Check rangefinder patch contrast and vertical alignment, and inspect the cloth curtains for pinholes and capping. Test the available speeds and confirm the flash sync operates. Look for finder haze in both windows and verify a clean screw mount and smooth film transport.