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Off the top of my head, I'd say the 10" dobs used by Mike and DaveP are probably producing the "best" Jupiter’s in terms of the optimum balance of image scale, resolution, colour and detail. Just check out their Ganymede detail, although Robert has produced that kind of detail too, using the C9.25, whereas I haven’t. Not sure if this is due to the Newtonian design being better for planetary detail compared to the SCT?
On those occasions where I managed to get some really sharp images, apart from seeing, collimation, focus and restricting my image scale to the x2.5 Powermate, I think that having an excellent equatorial mount may have made a significant contribution?
I’m not sure what it looks like from a dob platform, but with the Tak I was able to use K3CCDTools to grab 90 sec sequences, every 2 minutes for up to 1 hour, and Jupiter would still be substantially in the central region of the notebook display at the end of that hour. This meant that I could just set up the system and grab as many avi’s as the conditions would allow, with little manual intervention. I’m not sure if you dob guys have to tweak or nurse your systems along, maybe missing the occasional 40 or 50 secs of really good seeing?
This automated approach I used with the C9.25 and Tak, may just have allowed me to grab those few avi’s where the seeing really settled down within a period of already good (7-8/10) seeing.
Anyhow, another potential factor in the chase for those elusive, perfect images of Jupiter.
Cheers
Dennis
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