Originally Posted by
Jonathan Huyer
R5 cons:
Okay I officially don't like the single-point focus. The focus point is way too big. We were photographing bear cubs, and even when I put the focus box right on a cub it would often miss and grab something else like adjacent grass. I tried switching to spot AF to make the box smaller, but the performance diminished noticeably in the low-light conditions we were often in (the lens would hunt back and forth). By comparison, the regular-sized focus box on the 1DXIII is much smaller, and when I put it on an animal, it grabs the focus right away and never ever loses it. The focusing area is smaller of course, but as long as the box is on the animal, it will always (always!) be in focus. Not so with the R5.
I'd be interested in hearing from those who have the R3, if these issues are also present in that camera. But overall, I'm super pleased with how the whole system worked.