Spent the night last night up at the 2.3 meter telescope at Kitt Peak - an engineering run to look into lunar tracking and modify the control system software user interface.
While waiting for the moon to rise, got to do some high magnification photography through the telescope. The scope is equivalent to a 20,700mm F/9 lens! A full frame Canon 5D digital camera has a field of view through this system of just 6 x 4 arcminutes! - that's just 0.1 x 0.067 degrees!
Seeing was above average for the site and most of the shots here are limited by the scope slightly out-of-collimation optics.