Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: RobertM on Jul 18, 2014, 23:14:38

Title: Pelican Nebula - IC5070
Post by: RobertM on Jul 18, 2014, 23:14:38
From a couple of nights ago with the RH200.  16 x 600s 5nm Ha filter.

(https://farm6.staticflickr.com/5587/14500243307_e0a8c0504c_b.jpg)

Full wart version: https://farm6.staticflickr.com/5587/14500243307_cd0e620917_o.jpg (https://farm6.staticflickr.com/5587/14500243307_cd0e620917_o.jpg)

Tried to adjust collimation again but only succeded in making it worse plus there's some drift going on that I've yet to find the cause of :(

Robert
Title: Re: Pelican Nebula - IC5070
Post by: Fay on Jul 19, 2014, 08:26:43
looks a bit dark, is it my computer Robert?
Title: Re: Pelican Nebula - IC5070
Post by: Carole on Jul 19, 2014, 08:53:51
Looks dark to me too.

Carole
Title: Re: Pelican Nebula - IC5070
Post by: The Thing on Jul 19, 2014, 10:17:06
Lovely pointy stars but the gas/dust is a bit flat grey. The background looks completely black on my laptop. Very promising though, quality optics and steady mount.
Title: Re: Pelican Nebula - IC5070
Post by: RobertM on Jul 19, 2014, 10:58:48
Does this look better ?

(https://farm3.staticflickr.com/2910/14689428492_f901f7d891_b.jpg)

Full size: https://farm3.staticflickr.com/2910/14689428492_0047871647_o.jpg (https://farm3.staticflickr.com/2910/14689428492_0047871647_o.jpg)
Title: Re: Pelican Nebula - IC5070
Post by: Carole on Jul 19, 2014, 11:16:44
A bit better Robert, I still think it's too grey and flat looking though.

I found a tweak in brightness and contrast in PS looked even better, but you'll need to be careful of the stars that you don't blow them out.  

Great detail with the dark nebula though, shows the markings of the beak outline and eyes very clearly.  this shows up much better in your revised image. 

Carole
Title: Re: Pelican Nebula - IC5070
Post by: RobertM on Jul 19, 2014, 11:26:09
I think I know what I did wrong so I'll reprocess from scratch - the result should be a lot more contrasty so addressing the general flatness issue.

Robert
Title: Re: Pelican Nebula - IC5070
Post by: MarkS on Jul 19, 2014, 13:26:02
It looks very promising ...
Title: Re: Pelican Nebula - IC5070
Post by: RobertM on Jul 20, 2014, 17:29:57
I've taken the contrast a bit further than I would normally do but to get the real contrast means adding another colour which will have to wait till another day.

Sorry Carole it remains grey for now.

(https://farm6.staticflickr.com/5595/14677234906_96af7ea4b3_b.jpg)
Title: Re: Pelican Nebula - IC5070
Post by: mickw on Jul 20, 2014, 19:18:52
Careful Robert.........................

Carole is trying to tempt you to the Dark Side of reprocessing ad infinitum  ;)
Title: Re: Pelican Nebula - IC5070
Post by: RobertM on Jul 20, 2014, 19:54:52
Quote from: mickw on Jul 20, 2014, 19:18:52
Careful Robert.........................

Carole is trying to tempt you to the Dark Side of reprocessing ad infinitum  ;)

Absolutely... I had to fight hard, the Light Sabre keyboard was starting to flashing red :o
Title: Re: Pelican Nebula - IC5070
Post by: mickw on Jul 20, 2014, 20:21:52
QuoteI had to fight hard

Obi Wan has taught you well

May the farce be with  :lol:
Title: Re: Pelican Nebula - IC5070
Post by: Fay on Jul 20, 2014, 20:29:11
  :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: what a good double act!
Title: Re: Pelican Nebula - IC5070
Post by: MarkS on Jul 20, 2014, 21:57:26

On my monitor it still has large areas of flat almost uniform grey.

As an example, this one http://orlop.net/astro/pelican-nebula-narrowband/ looks just about right on my screen.

Mark
Title: Re: Pelican Nebula - IC5070
Post by: RobertM on Jul 21, 2014, 09:45:59
Ok, I'll take another look.
Title: Re: Pelican Nebula - IC5070
Post by: RobertM on Jul 21, 2014, 21:23:56
Does this look better (though I've overdone the dark enhancement) ?

(https://farm3.staticflickr.com/2909/14731252993_6669ffd204_b.jpg)

A bit bigger: https://farm3.staticflickr.com/2909/14731252993_94ff6d795a_k.jpg (https://farm3.staticflickr.com/2909/14731252993_94ff6d795a_k.jpg)
Title: Re: Pelican Nebula - IC5070
Post by: mickw on Jul 22, 2014, 07:45:55
I think it's a lot better, shows much more detail - Nice one Robert

Just got to do the colour now  ;)