At the suggestion of
@Ralph Bruno, I'm asking the good folks on this site to help me figure out what I'm doing wrong, or why I can't get razor sharp photos like so many I see on this site. An example...this whitetail fawn was shot with my D500 and 600mm f4G. I'm not sure what distance, but it wasn't far. The first photo is SOOC, no cropping or processing at all, so I was pretty close. I'll admit, it's not a great photo, sometimes the subject is too close! Just want to use this as an example.
Second shot is a 100% crop of just the eye. And...it's just not sharp! Specs: D500, 600mm f4G, tripod (A-S B1 ballhead with Wimberley Sidekick), f4, 1/250s, ISO 1600, VR on Tripod mode. I know the shutter speed is pretty low, but I don't think that's the issue as I see this same "muddy" look on a lot of my photos. And the reflection in her eye is basically crisp enough to see the trees, but the fur around her eye is just...bleh...