Canon 5DSR II
- Aug 16, 2012
I was replying to the comment "You will be able to shoot F8 @400mm with the 1.4x." with you will only be able to do that if the lens is f/5.6 at 400mm, because we don't know yet what the aperture will be at 400mm. I happen to walk around sometimes with a Sigma 150-600, and it is really good at 400mm f/6.3. So, I don't understand your post.So all those folks walking around with a Sigma 150-600 (either variety) are doing the impossible? (They are both f/6.3 at 400). If AF and IS work better and DR and noise are also improved, how is 1/3 of a stop the end of the world?