Pentax ZX-5, which is an AF version, whereas the ZX-M is totally manual focus, but does have Program, Shutter Priority, Aperture-Priority and Manual modes. It must be the lightest SLR I have picked up thus far. Unlike the comparable Nikon N65, the ZX-M meters with non-AF lenses, and should be thought of as a replacement for the venerable Pentax K1000. It has exposure compensation settings of +/- 3 in half -stop increments, and an ISO range of 6 to 6400 if you set it manually. There is an exposure lock button that lasts for 10 seconds after you push it. Shutter speeds of B, and 2 sec to 1/2000 sec, and in aperture-priority mode you can get times exposures as long as 30 seconds. The electronic shutter is stepless in A mode, so, shoot away! The camera has single shot mode, continuous (2 fps) and self-timer. There is also a depth of field preview button... something that is often missing on inexpensive cameras.
The camera is incredibly light, and with the 50mm lens, batteries (2 CR-2) and a roll of film, weighs just a bit over a pound. The penta-mirror keeps the weight down, and the relatively low-profile of the camera makes it easy to tuck into a bag. I have a roll of the FPP 200 b&w film in it now, and will post my results later.
While many people give the advice to start with a 35mm SLR camera like the Pentax K1000, Canon AE-1, or Nikon FM, there is no reason not to use a camera like the ZX-M. The features are more advanced than the K1000, which is now getting on in years, and it's also a fraction of the price. It's certainly cheaper than a 4-pack of Fuji Superia film at Walgreens. It uses every K-mount lens, and can certainly be used to take wonderful photographs.