Horse head and flame nebulas in Ha...and a little problem :(

[Luis Campos]

Hi all,

Yay!!! A clear night... this is a reason to celebrate now...lol

Didn't last long though, but it was enough to give a run on the horsie and flame nebulas in halpha with the mono Canon 550D and 200mm newt. (now stopped down to 175mm f/4.6)

Unfortunately my Baader MPCC come corrector and halpha filter have a tendency to produce nasty halos on very bright stars, there's such a halo near Alnitak, I tried to clean it up but it's still there, do you guys know of a good method to clean this up?

I'm really happy with this one, very nice details showing, check out the little "horn" on the nose of the horse head, this means a good resolution is beeing achived

Here the full resolution image:

https://www.flickr.c...eposted-public/

Here at 50% resolution:

https://www.flickr.c...eposted-public/

Here a crop of the horse head at 70% resolution:

https://www.flickr.c...eposted-public/

Hope you enjoy...and let's hope for clear skies, don't loose hope guys!

Cheers,

Luís

[Allinthehead]

Stunning detail

[laudropb]

Very nice image.

[Uranium235]

Which version of the Baader are you using? Mk II's are notorious for this problem, but the MkIII is much, much better.

The only temporary fix I can think of is a layer mask, but as it stands you've got it well under control.

[toxic]

very nice horse and flame Luis

how have you stopped it down because i think that may be the problem you have 2 reflections of Alnitak the the left side of Alnitak but a great picture no the less.

[Luis Campos]

Which version of the Baader are you using? Mk II's are notorious for this problem, but the MkIII is much, much better.

The only temporary fix I can think of is a layer mask, but as it stands you've got it well under control.

Hi Rob,

This is the very first generation, yes I think you are right, I read somewere that the new generation MPCC's are much better as you say In that case I'll have to live with it for now

Cheers,

[Luis Campos]

very nice horse and flame Luis

how have you stopped it down because i think that may be the problem you have 2 reflections of Alnitak the the left side of Alnitak but a great picture no the less.

Hi Chris,

Well spotted

This is in fact two sets of images, the camera had a slight variation in orientation between the two set (2x 6x20min. subs) this is why I have two overlayed reflections.

BTW...the image looks much darker on this pc I'm using, maybe I should raise the black point a bit...? It looked better on my other PC were I processed it.

Cheers,

[toxic]

i wasn't picking fault's Luis just wondered if it was they way you stopped it down from 200 to 1.75 that gave the halo's.

i get the halo's when i use a 2" uhc filter on the skywatcher coma correcter in com junction with the Baader 36mm unmounted L & S2 filters on the efw2 if that makes sense, so i no longer use the uhc filter and dont seem to be bothered with them now.