Quote:
Originally Posted by ddk632
So I just got the 100-400L (exciting) and the 2.0 TC ...
And it doesn't work with the TC at all ... shows 00 where aperture should display, and shutter won't depress - any ideas? I'll try and do the 6D firmware from April to see if it fixes.
Coming to think of it, my 6D does the same thing with my Kenko 1.5x TC -- I thought it was incompatible because it's an old TC, but maybe there's something wrong with my 6D when it comes to recognizing a TC in general? Sort of bummed but the 100-400L will still be kick-ass to use at the track and better than my 70-300 (non L).
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The 6D will only AF with apertures as small as f/5.6. A 2x TC is going to get you out to f/8, where you'll need a 5D MkIII, a 1D X or a 1D IV-III-II.
The 6D has an entirely different AF system from the 5D3 and the 1D X. I wouldn't hold my breath waiting for f/8 AF on the 6D. That's part of the reason it's so much less expensive.
The 100-400mm is a great, workhorse lens.
Dave