« Last post by FEBS on Today at 10:44:14 AM »
I think the point is that the 2xIII is lighter than the 100-400, i.e. take 70-200/2.8 and 2x instead of 70-200/2.8 and 100-400. My travel zoom is usually a compromise (70-300L), but on trips when I was taking the 70-200 II, I would toss in the 2x 'just in case' whereas I would not take both the 70-200 and the 100-400.
Of course, if you compare the 70-200 and 100-400 against the 70-200 and 2xIII extender. Then the last has for sure a weight advantage. I understood however as travelling light as taking one lens in that case, and then I would definitely go for the 100-400 seen as a birder/wildlife. I would not propose the 70-200 + 2x combo to a wildlife/birder as a starter. There the 100-400 or the 400/5.6 seems a better choice. A you know, you always want more mm after some time. If you don't focus specifically on wildlife/birds, then the 70-200 + 2x would be a better choice, but this thread is about a wildlife/birds/sports beginner.
Nice photo of that combo anyway