I've got a Canon 400mm F5.6 and I find I'm using the 1.4 TC a lot, so I thought I would get the Sigma 150-600mm instead.
But if my 7d won't autofocus on anything over F5.6, how will the Sigma react at F6.3?? Will I lose AF at 600mm?
Cheers,
D.W.
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I've got a Canon 400mm F5.6 and I find I'm using the 1.4 TC a lot, so I thought I would get the Sigma 150-600mm instead.
But if my 7d won't autofocus on anything over F5.6, how will the Sigma react at F6.3?? Will I lose AF at 600mm?
Cheers,
D.W.
I used the Sigma 150-600 on a trip to Antarctica and it performed well with my Canon 6D.Quote:
Originally Posted by Darrell Richards
I did not attempt putting a TC on this lens.
Larry
The lens will report to the camera as a 5.6 lens even at 600 and will AF
