Originally Posted by Vespobuteo
Still no phase-detect, but a f2.8 lens will definitely help in AF-speed though.
I am not sure the influence on speed is as large for CDAF as it would be for PDAF. Remember that CDAF has been used on lens combinations far below (numerically above) F8 while PDAF usually struggle to go on strike beyond F8.
I will not go to the 200, but I like my 100-400