Camera question

[breadlord]

The Nikon mount is fully compatible across the range.  However not all the features on the latest Nikon lenses will work with all cameras across the Nikon lens.

Yes, this is true. The lower end models don't have the focus motor in body, so you have to use the newer S lenses.

As for the *really* old lenses, they're pre AI; they don't know what aperture they're on, so they can meter incorrectly. But everything mid range and above incorporates the old systems so you can still use them.