Our resident Hawk responded to my need [View all]

for wildlife to test shoot today

As tests, the only post processing on these photos is brightness and cropping, not even noise reduction.

The first three are shot at 1600mm, next three at 800mm. Not sure any difference can be discerned on the net, but the 800mm is slightly sharper on my monitor. I also struggled to get back far enough to get the entire body in at 1600mm, partially the reason I have shied away from a large prime as opposed to a zoom. 1600mm has its place, just not in my yard.