Canon's late screw-mount rangefinder — the 7s, built-in CdS meter, mechanical shutter, LTM, 1965.
The Canon 7s is a 35mm screw-mount rangefinder from 1965, a development of the earlier Canon 7 and near the end of Canon's rangefinder line before the company concentrated on SLRs. It carried a built-in meter and the accessory shoe that the plain 7 lacked, making it one of the last and most fully equipped of Canon's LTM bodies.
It is a 35mm coupled-rangefinder camera for Leica Thread Mount (39mm screw) lenses, with a viewfinder carrying selectable projected frame lines for several focal lengths. It has a built-in CdS light meter for exposure guidance. The shutter is a mechanical metal focal-plane unit that fires without a battery; only the meter is battery-dependent.
The combination of a bright multi-frame finder and a coupled meter makes the 7s a practical, self-contained rangefinder for street and documentary work, capable of accepting a very wide range of screw-mount lenses. It suits photographers who want in-body metering while keeping the mechanical shutter and rangefinder handling of a classic 1960s body.
Test the rangefinder patch for contrast and correct vertical and horizontal alignment, and check the finder for haze affecting the frame lines. Confirm the CdS meter responds and tracks light, noting that its cell can age and the original mercury battery type may need a modern substitute. Run the metal shutter across all speeds for capping, and check advance and rewind feel.