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Back again, David with a answer to some of your questions.
The magnification of the telescope with the camera mounted directly to it can be determined by dividing the focal length of the telescope by 50. For example, a 1,000mm focal length telescope would yield 20 x magnification compared to a normal 50mm camera lens.
With the setup I used to image Mars the magifiction would be around 250x
e.g. 10" f10 has a focal lenght of 2500mm mulitply that by 5 (5x Powermate) we end up with a focal lenght of 12500mm. Divide this by 50 and we end up with a magnification of 250x.
In terms of image scale we end up with about 0.12 arcsec per pixel.
Anthony
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