Thank you Gabriela and Steve for your comments. This is a full frame shot. These are very reactive critters and at 800 mm I was happy to get anything in frame. With the 2x wide open is f/9 so that is the only option I think. The choice of portrail or landscape is determined on the fly with going with the orientation I have at the moment when the opportunity arises for any shot of this kind of subject. I don't use tripods (beyond my patience and capability to manage). So handholding 800 mm, getting the subject in frame at all is the goal. I do the best I can to frame the shot but there isn't always many options.
Good point about trying NR with ACR (which I imagine converting with Lightroom would do). I'm a retired NASA computer engineer that worked most of my career on synthetic images. I developed my workflow some years ago and found converting to B&W to do the lion's share of processing with Silver Efex to my liking. Contrast, brightness, structure are the primary adjustments (if you've not used Silver Efex). With structure having impacts on noise, sharpness and acutance. I reintroduced color with luminosity blend in Photoshop and then adjusted with Topaz Adjust. A little excentric, I know, but it works for me. I'm always a bit conflicted on color rendition since color model is often out of my hands with respect to browser determination not to mention monitor calibration. I'll adjust to output as needed but mostly for print which tends to be interactive since to my eye color is best adjusted case by case and paper matters greatly.
Pardon my ramble. Thanks much for your comments. Gabriela, I don't have a good shot of the full length of this squirrel but I have a shot of another one from Prague, Czechia that is one of my favorite squirrels that I'll work up and post. It has the greatest ears.
Cheers,
-Michael-