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Magnification is meaningful only when you observe something visually.
Than the magnification (this is a number without dimension) indicates how larger the viewing angle is - for example, Moon has apparent diameter of 0.5° on the sky .
If your telescope has magnification 100x, the Moon will be seen through the eyepiece with apparent diameter of 50°.
When taking photographs, we are dealing with the scale: arcsec/pixel for example.
Your estimate of FL (6400mm) and you pixel size will give you the scale of your camera system.
Assuming pixel size is 5.7u, you have 0.36 arcsec/pixel
Last edited by bojan; 20-03-2012 at 11:34 AM.
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