let me first quote:

Pentax MZ-M—This is a close runner up to the ME for the best Pentax bargain. It’s a stripped-down MZ-5n without autofocus, built-in flash or matrix or spot metering. However, it has all the great ergonomics and controls of the MZ-5n: manual shutter speed dial, easy exposure compensation, exposure lock, and depth of field preview. It is remarkably light, 324 grams for the body including batteries, and goes to 434 grams and fits in your pocket with a 40mm f/2.8 lens. Sure, it doesn’t have automatic flash or autofocus, which limits it in some situations, but for outdoor/ travel photography it is great. The one thing that it really lacks is the big viewfinder of the ME. Its viewfinder is actually quite bright, but its magnification is way smaller than the ME, which makes it harder to focus. On the plus side, its split-image central focussing area appears to be especially accurately calibrated. It has a plastic lens mount, which some people deplore, but I haven’t had any problems with it. There is a traditionalist prejudice in favour of metal, but as noted in regard to the ME and MX, metal bends. I have come across used cameras with metal mounts that have bent, making the lenses very hard to remove, but I have yet to hear of a plastic mount that has broken or worn out.

It certainly is light, I’ll see how it performs tomorrow