I have a 200-400 f/4 Nikkor on loan at the moment, I thought I'd give it a go on the recently waning moon. This shot was taken at ISO 400, f/11 at 1/250s. Imported into Aperture where I made my edit and where it was 'balanced'. Then, using Nik Software's Viveza, I managed to bring down the 'heat' of Tycho's ejecta. I then used Sharpener 3.0 on it to bring out as much detail as possible.
I'm going to have a go with one of my telescopes one of these fine nights. Tethering my D3 into the MacBook Pro makes short work of getting critical focus/exposure right through the telescope. More to come.