I've been looking into older "legacy" Nikon lenses in the 100mm focal range, which are considerably less expensive than the 105mm AF-S ($900 usd). Because I won't be tethered to any of the program modes of my camera, I figure one of these will be a great lens to increase my skill in Manual mode. I've seen photos taken with the 100mm E, and they are quite outstanding in terms of DOF and sharpness. An "Excellent" copy of this lens is around $100-120. I have also read that the 105mm 2.5 AI-S is "legendary," but is just under $300 for copy rated "Excellent." Questions: Is the 105mm $200 better? Will these lenses meter on a D40 or D90(which I will have purchased in a few weeks)? I have read in places where they will and I have read where they won't. Lots of conflicting information out there. Thanks, I'll hang up and listen.