p.3 #1 · Question: Are these pics sharp on 100-400 lens 5d MKII?
The critical focus in the first image is on the metal fence. I shoot a lot of birds--and herons have very skinny necks and it is hard to keep the focus point on them. The bird is very small in the frame--and the 5DMKII's af is not known for being the very best.
So the chances of having a very sharp and well focused image of the heron in this situation is iffy.
Just a very tough situation for the camera to render imo.
I have a brand new 100-400 that is tack sharp with all my cameras. I love it.