Chinon's 1974 M42 screw-mount SLR — stop-down TTL metering, all-mechanical, sold as Argus CR-2/GAF L-CX
The Chinon CX is a Japanese 35mm SLR introduced in 1974 as a development of the earlier Chinon CM, using the universal M42 screw thread. It was widely rebadged: Argus sold it in the USA as the CR-2, GAF as the L-CX, and it appeared in Europe as the Revueflex 2000 CL and 3000 SL through the Foto-Quelle chain, so identical bodies turn up under several names.
The M42 mount accepts the vast range of 42mm screw lenses from Pentax Takumars to Zeiss and Soviet glass. Exposure is set manually with the aid of a built-in TTL light meter using stop-down measurement, activated by pressing a slider beside the lens mount. Focusing is manual on the lens ring, and the camera operates mechanically, with the battery serving the meter only.
It appeals to shooters building an M42 kit who want a straightforward, honest body without electronic dependencies. The stop-down metering routine is slower than open-aperture rivals but teaches exposure fundamentals well, and the CX pairs naturally with inexpensive vintage primes. Rebadged Argus, GAF and Revueflex versions often sell cheaper than Chinon-badged ones for identical hardware.
On the used market, run the shutter at all speeds and watch for tapering or sticky slow speeds after decades of storage. Test the stop-down metering slider moves freely and the meter needle responds; original mercury-cell calibration is a consideration, so check what battery the example has been adapted to. Look at the mirror bumper and light seal foam, which almost always need replacement at this age.