« on: November 07, 2011, 08:26:33 AM »
"Having in mind the above, this means that Canon 1D X cannot focus on the longer (telephoto) lenses which have an aperture smaller than f/5.6, say 6.3?
This includes (at least) the following lenses:
Erm no it doesn't because the Sigma lenses at f/6.3 report to the camera that they are f/5.6 or they wouldn't work with any other camera than the 1D series. I suspect that the Tamrons use the same system.
Even if they did report f/6.3, why would this be Canon's problem?
None of the above lenses are theirs, so why would Canon care?
Maybe Sigma/Tamrom will need to pull their finger out and produce newer, better lenses that don't drop down to f/6.3 at the long end?
I doubt that a person who can afford a 1Dx will bother much with these lenses.