I would value opinions about the importance (or otherwise) of image scale (i.e. acrseconds per pixel) in planetary imaging. Do concepts of under and over-sampling have much bearing?
I have a number of options to play with to match a CCD to a FL of 6600 (native) or 19,800 (powermate 2.5). The scope in question is my resurrected Dall-Kirkham (unmodified). It's a 317mm diameter f21 scope that I have recently brought out of mothballs and largely replaced everything bar the optics.
The choices I have without going out with credit card in hand are:
Orion Starshoot Video:
8.4x9.8 microns;
Barlowx1: 0.28 as/p FOV 2.5 x 3.3 a/min
Barlowx2.5: 0.11 as/p FOV 1 x 1.3 a/min
It's been a little while, so I would say aiming for something around 10m-12m give the aperture will give you something useful to work with. The faster the frame rate the better.