The 2-stop aperture reduction can be a bridge too far for DSLRs. For example, if you use the teleconverter with a Nikon AF-S 80-400mm f/4.5-5.6G ED VR lens, the widest available aperture at longer ...
Daniel Bell compares 2x converters from Nikon and Kenko at two ends of the price scale.
Class leading image quality for Nikkor telephoto lenses.