My local used shop has two 105mm 2.5 lenses both in pristine condition. One, the newer is an AI-s with the little built in sliding hood. It's focus is silky smooth and offers almost too little resistance to turning. I played with it on an F5 and it seems a joy. The older lens (?? non-AI-s, anybody?) has a bit of a taper to the barrel and no hood built in. It's focus is silky and offers what seem almost a bit too much resistance to turning the focus. Both are 9+ outside, clean inside with a couple dust specks. Both come with a free-checkup at the Nikon service center up the street so no risk. Both should function just fine on a D2X, right? 200 v. 150 $ Anybody got an opinion as to which is the more desirable lens. $50 difference is of no consequence considering the alternative is a much more costly 105DC. I really like the retro-feel, think-before-I-shoot functionality, and for portraiture MF is something I want to get back to, I think. I suspect that worst case is I get it, don't use it and get it snapped up here on the for-sale board for $100 in a heartbeat. OK manual guys...talk to me.