Quote:
Originally Posted by jjjnettie
Congratulations Greg.  |
Thanks JJ. I was happy to be able to pick up that detail so low.
Quote:
Originally Posted by Ross G
Looks good Greg.
Again something I haven't seen before.
Thanks.
Ross.
|
Cheers Ross. Its really a northern hemisphere target. It must be about 10-15 degrees up from the horizon here in Sydney.
Quote:
Originally Posted by jase
Nice work Greg. I'd be pretty surprised if you didn't pick out the faint Ha shell with 17" operating at F4! I recall when I imaged this target with a 24" RC operating at F8, I needed 900s subs to pick it up. Mind you I was operating with a back illuminated ccd with at peak QE of 98%. Your rendition is coming along well. Hope to see the finished result assuming it doesn't get too low for you to complete the project. Well done.
|
It wouldn't be the first time a scope didn't do what might be expected though.
Fortunately it did. When I first got the CDK17 it would not pick up the Helix practically at all with 10 minute subs and 5nm Ha with a bright moon.
A better secondary shroud, using 2x2 binning, better gradient processing and the reducer make it all work.
Greg.