[pmrid (Peter)]

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

Lodestar
8.2x8.4 microns (752x580)
Barlowx1: 0.26 as/p FOV 2.5x3.2 a/min
Barlowx2.5: 0.1 as/p FOV 1x1.3 a/min

QHY10:
6.05x6.05 microns (3964x2712)
Barlowx1: 0.19 as/p FOV 8.5x12.4 a/min
Barlowx2.5: 0.07 as/p FOV 3.4x4.9

QHY5L-II
3.75x3.75 microns (1280x960)
Barlowx1: 0.12 as/p FOV 1.9x2.5 a/min
Barlowx2.5: 0.05 as/p FOV 0.7x1

Olympus DSLR an OMD-EM1:
3.7x3.7 microns (4608x3456)
Barlowx1: 0.11 as/p FOV 6.6x8.8 a/min
Barlowx2.5: 0.05 as/p FOV 2.6x3.5 a/min

Anyone??

Peter