Nancy, I do very little PP sharpening. I am shooting a D810 with a 80-400 4/5.6 combined with a 1.4 tele-extender. this was shot at F/8 ISO 800, 1/500th. I was set up so that if he bolted, I could still get a nice crisp shot - of course unless he decided I'd look good attached to his antlers. I had a substantial, easy to climb tree between him and me. After all, the rut is just beginning and these guys can be pretty unpredictable when the hormones are raging.