The AF feels just as fast as any other series II lens (with the 1DX). I am not a sports photographer so I can\'t speak of that subject but if you shoot at night you may need the f/2.8 as opposed to f/4.
Great review, with amazing images..... makes me take a hard look at the 400 DO II, instead of waiting for the 600 DO.
Arash, have you tried its AF with TC IIIs on the 7DII? If so, is the AF behavior/speed similar to that with the 1Dx?
TIA,
Romy
Hi Romy, thanks. The 7D2 slows down quite a bit when you use an extender and it\'s not as accurate in my experience.There is a wide gap between it and the 1Dx when it comes to flight performance.
Best,
Chuck Westfield says otherwise. He says the 1dx and 7dii are the fastest drives for Af system with their circuitry.
Oct 06, 2015 at 06:08 PM
Previous versions of gschlact's message #13230988 « Canon EF 400mm f/4 DO IS II USM Review »
