Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: MarkS on Aug 30, 2008, 09:17:31

Title: Cocoon Nebula
Post by: MarkS on Aug 30, 2008, 09:17:31
Another work in progress.  This one from last night.

21 x 5min using modified EOS 350D on C11 at F6.3
I'll process it better when I get home.

This has been 3x3 binned and then cropped.

(http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/cocoon290808.jpg)

Title: Re: Cocoon Nebula
Post by: RobertM on Aug 30, 2008, 09:25:47
Lovely image Mark, I really like all the grey cloudy nebulosity that's showing up and the colour looks natural (if one can use that term ! with astrophotography!)

Title: Re: Cocoon Nebula
Post by: JohnP on Aug 30, 2008, 10:12:18
yep fantastic again Mark... When you coming home you are seriously depressing me wth all these images you keep posting...!!!!!

John
Title: Re: Cocoon Nebula
Post by: Daniel on Aug 30, 2008, 10:55:01
That's lovely Mark, again, one of those objects I just can't get anything more than a smudge out of here
Title: Re: Cocoon Nebula
Post by: MarkS on Aug 30, 2008, 13:20:09

I drive home Sunday :-(
Title: Re: Cocoon Nebula
Post by: Daniel on Aug 30, 2008, 15:00:13
One question about binning DSLR images, I've tried the binning in IRIS and that tends to blow out the image quite a bit, however when I do it in MaxDSLR, it doesn't but I don't really see any improvement over bicubic resizing in photoshop, am I doing anything wrong?
Title: Re: Cocoon Nebula
Post by: MarkS on Aug 30, 2008, 15:55:31
Daniel,

In IRIS, to prevent blowout, do a "mult 0.25" before 2x2 binning or "mult 0.11" before 3x3 binning.
Title: Re: Cocoon Nebula
Post by: Rocket Pooch on Aug 30, 2008, 18:56:23
very nice i love the blue bits
Title: Re: Cocoon Nebula
Post by: MarkS on Sep 01, 2008, 23:30:52

Here is the re-processed version.

32 x 5min using modified Canon EOS350D on Celestron C11 and F6.3 reducer.
2x2 binned and cropped.

(http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/cocoon290808~0.jpg)
Title: Re: Cocoon Nebula
Post by: Carole on Sep 02, 2008, 07:52:59
Wow, that fabulous mark.

Carole
Title: Re: Cocoon Nebula
Post by: Fay on Sep 02, 2008, 08:19:55
Great image, Mark. The modified camera's certainly do a good job!

Fay
Title: Re: Cocoon Nebula
Post by: Mike on Sep 02, 2008, 09:38:20
Really superb image Mark. Some of the best detail in the Cocoon i've seen.
Title: Re: Cocoon Nebula
Post by: MarkS on Sep 02, 2008, 10:53:59
Thanks for you comments. 

One thing that also helped was that the seeing was quite reasonable that night.  One annoying thing is that I lost approx 8 subs because of dewing:  I dozed off and then awoke to find dew on the telescope corrector plate :-(
Title: Re: Cocoon Nebula
Post by: Mike on Sep 02, 2008, 11:52:32
You want a dew alarm you do.
Title: Re: Cocoon Nebula
Post by: Daniel on Sep 02, 2008, 12:42:19
Fantasic image Mark, especially on such a "git" of an object, really nice processing too, love the patches of dark nebula around the outside.