Fricks wrote in post #13632311
how does the 70-200 II with 2x tc compare vs 50-500
Results may vary between units, but from the short tests I ran, the 50-500 bested the 70-200 II w/2x TC on an equivalent 400mm test shot. Sigma won sharpness, which was the big one for me. Canon probably had better color, and still had better bokeh (Sigma bokeh is a bit funky) even with the TC.
Maybe I'll run the tests again at some point, but it's not high on my priority list, if at all. I'm pretty much resigned to offloading the 70-200 II at this point. The 50-500 OS will hit the chopping block if necessary, but I'd still like to keep it
So darn versatile.