What would your opinion be on an old 70-210 f4 lens? It seems like there are a few for sale and would fit easily in my budget. Would I be giving up a lot by limiting myself to f4?
f4 @ 210mm is decent, although the D90 isn't exactly stellar over 1600 ISO. It depends on the situation - although I always prefer (aperture) speed over, say, VR, perhaps a 55-300 VR would be preferable.
- f/5 @ 200mm (so, not a huge difference over f/4)
- VR
- AF-S
- at 200mm, better optically than the 70-210 wide-open