Re: 2X Extender III with the Canon 70-200 f/2.8 II
I have found the 70-200 f/2.8 IS MkII + 2xTC MkIII combo to have a surprisingly good IQ even wide open, probably similar to 100-400, and approaching 400 f/5.6.
However, as with any previous 2xTC extenders, not only that the lens AF drive speed takes an automatic reduction by 75%, it also means that the camera AF system receives 4 times less light than with the bare lens.
Here is one of my combo IQ test shots, and then about 100% crop. Done with handheld 1DMkIIN, f/5.6, natural light only.
Mar 22, 2012 at 11:45 AM
Previous versions of PetKal's message #10464886 « 2X Extender III with the Canon 70-200 f/2.8 II »
