[Jeff]

Lovely images, especially the Saturn one. I think F25 is the sweet spot for the 9 1/4.

Thanks Paul. I was worried about the FL of almost 6m under average seeing, but encouraged by the results.

Grouse results Jeff, Saturn is very 'crisp'
Did you have any Jet-Stream at the time ?

Sorry cant help with Re: focusing on separate filters, I havent had a mono cam before, tho, one is in the pipeline, so, I be watching with interest for any further discussion relating this aspect
Tho, I would suspect Not with Planetary, as time is of the essences ?
But on the other-hand,,, maybe, if filters are not parfocal, but again I'd assume these day's most would be, at least reasonably well
Do you notice much difference in the screen view after changing filters ?

Nice result all the same

Thanks Bob. No Jetstream … seldom bothers us down in Melbourne. But bloody cold (1.3 degrees), and a little bit of fog starting to block stars at lower altitudes. The Orion RGB filters seem close to parfocal, but not quite. Screen/histogram brightness varies per filter … especially for Mars, where the Red transmits heaps more light.

Good luck with your imaging!