I've been looking for a new lens for my D40x, and I've been told only the Af-s type Nikkor lenses will fit. Is there a certain type of Sigma, Tamron, etc brands that only work with my D40x? If so what are the abbreviations for those brands? Edit: I was talking to my dad asking if he had a camera ever, and he said he had 'an old nikon fe 35mm camera', but it got stolen out of his suitcase a while back(when it was still new). He says he still has all the lenses in a box, under our house. Is it worth it to go digging for them, would they fit at all?? I imagine if they do, it'd be manual focus only.