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Old 04-02-2020, 09:49 PM
Martin Pugh
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Martin Pugh is online now
 
Join Date: Nov 2006
Location: Canberra, Australia
Posts: 1,339
Hi there.

What can 17” of aperture achieve at f6.8 under pristine dark skies with spectacular seeing?

Check out the attached….this is a single 15 minute sub in each RGB channel. I didn’t even bother to calibrate it. I used hot pixel rejection in CCDStack, registered, and then combined. No other processing whatsoever. FWHM of all 3 frames was 1.1 asp.

Data of this quality is hard to come by - so subscribing to my Chilean based CDK may just interest you

Cheers
Martin
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