1. Fixed aperture means and no matter the zoom range you set the lens you can still set it up for f/2.8 but it can also adjust up to f22.
2. Yes, this lens is compatible with the D2xs. Click on the linck below for information on FX and DX format:http://support.nikonusa.com/app/ans...
answered 2 years, 6 months ago
2 years, 6 months ago