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where does a 9.25" Celestron sit next to a 10" newtonian (dob) in terms of ability to see this sort of detail. forget about barbados or colour or tracking, lens for lens, how do they compare
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The focal length (image scale) of the SCT will be almost double that of the newt, so for planetary imaging the SCT will win.. for newts you need at least a 5x barlow to get the same image scale.
It's the jetstream that kills us (for seeing) here, it's been overhead sydney for the last 4-5 days and doesn't look like changing for a while.
Visually, the newt has a smaller CO and you can't go the same magnification visually as you can when imaging, so the newt should win, but not by much.
John, I haven't heard of him - i'll have a search around to find some of his images.