mas24 wrote:
His best bet is to get the 1.4X. You will get more degradation using a 2.0X. The Canon "L" lenses and Nikon Gold Ring lenses are exceptions though. Very slight degradation using teleconverters. Tamron makes quality lenses, but aren't comparable to the above mentioned lenses. Almost? I have an interest in the Tamron 70-200 f2.8 G2.