Ed, great pintail burst.
Here's a big 8x10 white-tail buck that presented himself to me this evening, right after sunset:
Big Buck In Cattails by
David Stephens, on Flickr
I'm using the Canon EF 500/f4 II, with the EF 1.4x TC-III, on the Sony a9, with a Metabones EF-to-E t-adapter MkV. Note, this is ISO 10,000. Both my Sony bodies are super at high-ISOs.