Quote:
Originally Posted by multiweb
Good stuff Dennis. Thanks for all the info. 
On the paper the CN-212 at F12.4 gives me 2630mm FL and an image scale with the QHY9 of 0.42 with a field of 23.4'x17.4'. Because like you I'm further at the back those figures will probably be on the low side.
I have a reducer to bring it to F9.9 but that's another element that takes backfocus.
That's a really good shot up close. Still not many gaps between stars even at that FL. |
Thanks Marc, I appreciate your comments.
The processing phase was a bit of a baptism by fire in using PixInsight, as I found that CCDStack really struggled with the ASI1600MM files (I had previously been using the ATIK 414 EX which it handles much more responsively).
I found a “Batch Pre-processing” Script in PI and just chucked in my Bias, Dark, Flat and Light Frames and punched the “go” button and all seemed to work well.
I used to blink through all my LRGB frames manually in CCDStack to catch and manually reject any funny ones that should be excluded, so I will have to figure out how to achieve the same in PI, as I may have included some duds in the big bucket of frames I poured into PI, without any prior checking.
These large chips certainly stress the PC during the processing phase, thank goodness for apps like PI.
Cheers
Dennis