Hi all,
I have been using my Nikon D80 with the 18-135mm f3.5-5.6G ED kit lens and the Sigma 10-20 mm DC HSM wide angle zoom. I have liked the results, but some posts on this site suggest that I could get considerable better sharpness with better lenses. But, I am a bit confused. I see that Nikon SLRs have 2 sensor sizes: DX at 24x16mm (which the D80 has) and FX at 24x36mm (the D3, for example). How does this relate to lens choices? Nikon has a series of lenses specifically for DX sensor cameras and then others that do not specify they are for a particular sensor size. So, 3 questions:
1) Are the focal lengths of the DX series lenses the actual focal lengths or the "35mm equivalent" focal lengths?
2) Can I use non-DX Nikkor lenses on my D80?
3) If the answer to (2) is yes, will the effective focal length on the D80 be longer because of the smaller sensor?
Thanks in advance.
Peter