Recently have seen some stunning wildlife shots taken with the Sigma 50-500mm f/4.0-6.3 EX DG APO HSM, at the long end of lens. Now my 200mm is way off this focal length, so the question is how do people feel my Sigma 70-200/f2.8 with a 2x Teleconvertor will compare Picture Quality wise to the Bigma ?
Appreciate I will be at f/5.6 suddenly, but that is no worse than Bigma at 400mm. Also understand Optical quality will drop slightly due to TC, but just hoping this would be offset by Optical Quality of 50-500 being less than 70-200, based on extreme zoom range
Obviously the TC route would save lots of dosh....plus bag space
