David, disregarding AF for the moment, the shots with the 80-400 are much sharper. The Tamron shot, presumably at 300mm? looks just plain soft to my eyes. The 80-400 at 400 is much sharper than the Tamron at 300.
Did you try the 80-400 with better targets for AF to see how it performed?
I\'m not trying to be controversial, I\'m just concerned you may have returned a perfectly good lens for the wrong reasons.
Apr 25, 2013 at 05:22 PM
Previous versions of gfinlayson's message #11510431 « Nikon D7100, Official Image Thread »
