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astronobob
19-07-2014, 02:59 AM
Well yet another one from Last New Moon @ the Bob'servatory Leyburn
My Mega Data Effort - Hence 'my' mega data as in I normally aim for 10 subs, tho this M20 is 21 Subs :eyepop: :P = a major diff in SNR for this duck !
Still need more time with Processing practice, that said, this excersize has been very encouraging :thumbsup:
Subs were 400secs = 6.666 Mins with the 10" F4.7 BD Newt on Neq6p. QHY10 OSC @ -35deg
No darks bias etc - tho I did shoot 20 darks but havent added them in calibration yet, wanted to try with-out them 1st, then add them in next time and see what difference I can recognise/understand - be an interesting caper Im sure !
Worth a Squizz - let me know what ticks :question:

AstroBin 2.8Mb http://www.astrobin.com/full/108202/0/

multiweb
19-07-2014, 06:30 AM
I like the data very much but I think you had a 'HDR accident' along the processing flow. Maybe a repro is in order. Nice colors and details though. :thumbsup:

DJT
19-07-2014, 08:56 AM
Colours work for me Bob. Details good as well. Stars have artifacts but you know that already. Good job:thumbsup:

astronobob
19-07-2014, 09:08 PM
Appreciate your honest feedback Marc :thumbsup: The Stacked Image was a lot smoother that of 5-10 subs, and I not quite able to handle it properly yet by the sounds - no worries here mate, Its what I need to know, so your comment is well recieved. :cool2:

Cheers Also David, Yeah, I kinda Botched up quite a few stars hey :) Im tending to think that PhotoShop might not be the best Prog for Stuff, speshly this target, such a variation in star sizes to deal with ?
I have installed Nebulosity 3 to try out when I have time to go through some tutes etc, hopfully get more controlled processing for the better part, Neb 3 appears quite capable .. Interesting Im sure it will be :cool2:

Eden
20-07-2014, 02:11 AM
Fantastic work, Bob... a real beaut shot of a favourite target. Impressed with how much of the blue region and dark stratum you managed to capture.

One recurring feature I have noticed in your images is the absence of noise. I'm very interested to see what, if any, difference there is after you've subtracted dark and bias.

multiweb
20-07-2014, 04:05 PM
It's ok. The stacking is not the problem. Stars, details all are spot-on. It's just the dynamic range is screwed up. The luminosity of the core should be much brighter. The whole pic looks flat. This is something that happens in DSO with a big dynamic range if you try to show everything in one pic. It's something you can easily fix in the final. No need for a major reprocess.

E_ri_k
20-07-2014, 07:59 PM
Nice one Bob :) Impressed by how noise free it is with no calibration frames:thumbsup:

Interested in seeing a calibrated repro :)

Erik

astronobob
24-07-2014, 11:00 AM
Thanx Eden - I think the 21 x near 7min subs at F4.7 assisted in collecting the fainter blue signals. The introduction of noise (through streaching) I tend to deal with as it turns up during processing, will get to adding the Dark frames eventually - when I pluck up some courage :ashamed:


No worries Marc - I used to have a problem with Black clipping and too much contrasts - so may'ave under done this in that sence :rolleyes: Ive saved a few during processing stages - so can start on another half way through and go from there, Cheers :thumbsup:

Thanx Erik - been sidetracked away from a repro, getting to it, eventually :whistle: :thumbsup:

Star Catcher
24-07-2014, 02:55 PM
Nice, I like it Bob, I wonder how much of an effect the calibration will have?
Ted