Help choosing news zoom lens!!
I'm looking at buying a new zoom lens for my Nikon D90. I've looked online at the Nikon AF-S VR 70-300 f/4.5-5.6G IF-ED also the Sigma 100-300mm f4 APO EX DG and the Sigma 120-400mm f4.5-5.6 APO DG OS HSM, which are all within my price range.
What I wanted to know was which one I should choose for picture quality (I'm photographing mostly wildlife and the longer reach of the 120-400 appeals but does the image quality compare/exceed with either of the others? Anyone used any of these and have an opinion?
Many thanks in advance.