As larger MP bodies come to market in the following years, (hopefully 2014) the cropping capabilities will get better thus giving the 300 a bit more "reach" when editing. With that said, a 300 2.8 and hypothetical 46 MP camera combined would probably be about the same price as a 600mm alone....(obviously not the same reach)
Just something to consider when purchasing a lens to be used for many years to come.
To some extent I agree. But the problem moves from resolution to focus. It does not matter how much you can crop, if you can't position the AF points correctly. That is why I believe (hope) the 7D replacer, whatever they decide to call it, will be interesting.
1DXII, 5DIV, 5DSR, 8-15/4L, 11-24/4L, 16-35/2.8L III, 24-70/28L II, 70-200/2.8L IS II, 100-400/4.5-5.6L IS II, 200-400/4L IS 1.4x, 17/3.5L TS-E, 24/4L TS-E, 35/1.4L II, 100/2.8L IS Macro, 300/2.8L IS II, 600/4L IS II, Zeiss: 15/2.8, 35/1.4, 55/1.4 Otus, 85/1.4 Otus, Profoto B1