I am a long time Canon user. I apologize for troubling this impressively high-powered discussion with an elementary question. I think I saw the answer on the web somewhere, but I can't find it now. So if any one could point me to it, I would appreciate it. I think the F-2 Photomic can mount any Nikon lens, but there are some that it will not meter, or perhaps some that will only meter in stop-down mode (or perhaps this is a Canon peculiarity). Of new lenses, apparently the AFs won't meter (I see someone advertizing a modification); what about the lenses that are currently listed (by B&H, for example) only as manual? I assume all AI lenses will work, but I am not sure about AIS lenses. Any way, thanks. Don