Quote:
Originally Posted by Satchmo
If you found an effectively unobstructed 6" F10 reflector to be inferior to a 6" F8 refractor then you must have a really poor quality mirror.
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That's what I thought - poor quality mirror, but I star tested the scopes inside & outside focus, they seemed okay (acceptable). Did you fully flock & baffle your 12" GSO dob? I never bothered modifying my dobs (I don't even have enough time to use them) and I've sold them anyway, even my supposedly 'low-contrast' SCT's always showed better contrast than the dobs in spite of the larger CO's.
This is the reason why doubling the horsepower of your car does not make it go twice as fast. There are many other factors that affect it.