A big question for me please . How does mk iv focus beyond f5.6 as i have read that the sensors are horizontal only and not crosstype. Does it actually make any difference ? Basically I'm coming up from 7d and do nature stuff .
Attached is a must read!
http://www.learn.usa.canon.com …11/eos_white_papers.shtml![]()
Download the White Paper PDF, you'll find it full of great info.













