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[QUOTE=iceman]ditto AN, I guess it just depends what you're comparing it to. All of the GSO optics in the 10" and 12" models are f/5, which would make comparing against your f/7 quite difficult.[QUOTE]
I don't see why. Provided magnification is held constant, there should be no difference in optical quality between an f5 and an f7. Granted, getting a diffraction limited f5 is a bigger ask for the optician, but if I am assured that the f5 is diffraction limited at 1/12th wave, they should be directly comparable, ie what you see in the eyepiece should represent the optical quality (subject to seeing).
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