I just purchased a new D40, and now I don't know what to do. I was on the edge between a Pentax K100D and the Nikon D40, and I sprang for the Nikon because almost nobody would go for the K100D. Personally, I didn't go for it because of the slow auto-focus and lack of continuous shooting, and I went for Nikon. But now I'm really starting to realize there are NO prime AF lenses for the D40. I'm just looking for a cheap 30mm or 50mm lens from the 80's or 90's that will give me decent portrait shots in low light. The Sigma 30mm is there but f/1.4 which is a bit too expensive for me, I really only require an f/1.8 (the Sigma sells for upwards of $400). At first I saw the old Nikon 50mm f/1.8 (non-D) that I THOUGHT was AF-I, which would autofocus. ( http://www.kenrockwell.com/nikon/5018af.htm ) Unfortunately, I don't think it is anymore. Does anyone know if there are any wide - standard AF-I prime lenses? I don't think they exist. If anything I guess I could get one now, use manual focus, and when I upgrade the body in the next 3 or 5 years, I'll could use it then. But it still feels like I'm paying for something I can't even use. Man what if I end up going to Pentax? Hahaha... funny thing to say in a Nikon forum. Any suggestions?