Hi, you still have to use stop-down metering with the non-AI lenses. It's not that big a deal though. I prefer to use a hand held incident meter most of the time though, so it's a non issue for me. Most of my Nikkors are the pre-AI variety. In my case, I actually find the TTL meter to be distracting. Here is a link to a manual for the FM I just bought a Nikon FM from someone on this forum, so I've downloaded the manual too. Enjoy your FM, it's a great camera.