Chinon's mid-1970s M42 SLR — stop-down CdS metering, 1s-1/1000 shutter, also sold as GAF L-CS
The Chinon CS is a mid-1970s all-mechanical 35mm SLR made in Japan, with CS standing for Chinon Screw, the company's name for the universal M42 Praktica/Pentax thread mount. It was widely rebadged, appearing as the GAF L-CS in the US and the Hanimex 35SL elsewhere, and was sold in the UK from around 1976 as a keenly priced manual SLR.
The body offers shutter speeds from 1 second to 1/1000 with flash sync at 1/125, a hot shoe plus X and M PC sockets, and a self-timer. Metering is a centre-weighted CdS system read stop-down, with a centre-needle display in the finder, originally powered by a 1.35V PX13 mercury cell; the mechanical shutter fires with no battery fitted. Bodies came in chrome or black metal finishes.
As an M42 body it accepts the enormous pool of affordable screw-mount lenses, which keeps it relevant for students learning manual exposure and stop-down metering. It is sturdy, entirely manual and simple to operate, though the stop-down routine is slower than the aperture-coupled SLRs that followed it.
Mercury PX13 cells are no longer made, so the meter needs a zinc-air replacement or compensated cell to read correctly; verify meter response before trusting it. Also check the slow shutter speeds run true, the mirror returns cleanly, light seals have not crumbled and the focusing screen is clear.