I have the D90 + the 18-105 and 70-300mm VR lenses. I was thinking of the Nikon AF-S 300mm f4 + x1.4 teleconverter for 'super telephoto'
But I wonder how the Sigma 150-500 at 420mm compares with the 300mm + teleconverter? and in the 150-300mm range, is it superior to the Nikon 70-300 model?
[Edited 2009-08-19 10:29:24]