I just received my new canon 100-400mm lens and have been testing it out for the last few hours. It seems a bit soft to me but then again, I've never owned an "L" lens previous to this so how would I know either way.
Anyway... I setup my tripod and mounted the camera at a 45 degree angle to the ground, I laid a tape measure on the garage floor and aimed at the 15 inch mark. I actually used a sharpie and put a black dot at the 15 inch mark and that's what I aimed the center focus point at. I used mirror lockup, 2 second timer with a remote cable release with IS turned off.
This is the first time doing a focus test.... are these results good? Did I perform the test properly? It seems to me the lens is focusing somewhere around the 14.5 inch mark. Maybe I'm splitting hairs here????
What do you guys think?
Thanks in advance.