Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: Carole on Nov 28, 2011, 16:36:26

Title: Horsehead Nebula 27-11-11
Post by: Carole on Nov 28, 2011, 16:36:26
Taken from my Back Garden (POD) early hours of 28th.

29 x 5mins 800 ISO, CLS filter, Modified Canon 450D
Skywatcher ED120 Pro, Guided with ST80 and PHD
+ darks, Flats and Bias
Stacked in DSS and post processed in Photoshop CS3
Full Frame
Could do with a few more hours, but was quite pleased with it considering the location.
Hoping to add to it.

(http://gallery.orpington-astronomy.org.uk/albums/userpics/10047/normal_Horsehead_Nebula_27-11-11_29_x_5_800_ISO_Full_Frame_Forum_size.jpg)

Link to larger file
http://gallery.orpington-astronomy.org.uk/albums/userpics/10047/Horsehead_Nebula_27-11-11_29_x_5_800_ISO_Full_Frame_Forum_size.jpg
Title: Re: Horsehead Nebula 27-11-11
Post by: Fay on Nov 28, 2011, 17:42:32
Well that looks good Carole, come out well

I was heading that way but got fed up with next doors trees. Will have to set up elsewhere in the garden

Title: Re: Horsehead Nebula 27-11-11
Post by: MarkS on Nov 28, 2011, 18:02:08

You must have had a late night - I was also out last night - imaging until 6am.

I think that is an excellent result for a CLS filter from a light polluted area like yours.  The Horsehead itself has come out very well indeed.

The Flame has a weird colour cast though and the areas of nebulosity below the Horsehead should look a bit bluer.

These are only minor criticisms for an otherwise good result.

Mark
Title: Re: Horsehead Nebula 27-11-11
Post by: Carole on Nov 28, 2011, 19:09:56
Thanks Fay.

Hi Mark,
QuoteYou must have had a late night
I was up until 3.45, and then went to sleep while my darks were capturing.  

QuoteThe Flame has a weird colour cast though and the areas of nebulosity below the Horsehead should look a bit bluer.
Yes I thought overall it was all a bit too red, but the colour channels seem to be fairly even, so I decided to wait and see what feedback I got.  I'll have a further tweak and see what I come up with.

I was quite pleased with Alnitak this time as it was really blown out when I did this a year ago. 

Carole
Title: Re: Horsehead Nebula 27-11-11
Post by: RobertM on Nov 28, 2011, 21:30:48
I think that's a great result Carole, the colour cast will be difficult to control but non the less I think you've processed it very well.  Stars look good and there's a bit of underlying noise that a few more subs would help with - apart from that it could be one of your best to date !

Robert
Title: Re: Horsehead Nebula 27-11-11
Post by: Carole on Nov 29, 2011, 00:12:45
Thanks Robert.
Quotea bit of underlying noise that a few more subs would help with
Yes I am hoping to do at least the same amount again.

Carole
Title: Re: Horsehead Nebula 27-11-11
Post by: mickw on Nov 29, 2011, 10:23:54
Very nice Carole
Title: Re: Horsehead Nebula 27-11-11
Post by: Carole on Nov 29, 2011, 12:02:24
Thanks very much Mick