View Full Version here: : Dark Horse Nebula - added repro + B&W version
27-05-2012, 07:03 PM
Here's my rendition of the Dark Horse Nebula from Leyburn: click on the link for the 1800x1200 (1.4 MB) version (http://dl.dropbox.com/u/13644418/iis/DarkHorseNebula-1800x1200.jpg) or full resolution 5436x3623 (11.6 MB) version (http://dl.dropbox.com/u/13644418/iis/DarkHorseNebula-5436x3623.jpg).
The Pipe Nebula is fairly obvious, but the Snake Nebula can be found in the centre of frame.
18x 720 sec (3 hr 36 min total) subs taken with a Canon 5DmkII and 135 mm f/2L at f/4 ISO 200, mounted on a black stallion (EQ6) :)
27-05-2012, 07:04 PM
Side note... I happen to think that the Pipe Nebula is incorrectly named. I see a Brontesaurus! :lol:
28-05-2012, 08:57 AM
Lovely work, Dave. You're certainly nailing those wide field shots!
28-05-2012, 05:33 PM
Great shot Dave!
Brontosaurus maaaaybe...but my first impression was a Thorny Devil :question:
28-05-2012, 06:06 PM
Thanks Rick. I'm keen to get a bit closer with the RC8. Just need more dark skies + good weather!
Mike, wow... that does look like a thorny devil!
28-05-2012, 06:15 PM
Insane res on the big version, you can zoom forever :P. Excellent pic on Dslr gear, very sharp.
28-05-2012, 06:20 PM
And here I was thinking it was a Kiwi! In fact we're using an image of this dark nebula for our astronomy education group Galactic Kiwi.
Great image! :thumbsup:
28-05-2012, 09:09 PM
Thanks Fred and Cam!
Cam - I'm not sure that I see the resemblance of the kiwi...
I was having a look at my raw subs today, and noticed that they were actually better than my stacked version! Hmm... something fishy there.
I double checked in Deep Sky Stacker and it turns out they weren't being aligned properly - I wondered why I couldn't make the colours pop here.
A couple hours of troubleshooting later, it turns out that there was a problem with the flat frames - unchecking them from the stack fixed it. Weird?! :screwy:
Here's a repro that I much prefer to the original :) The colours are "real" (I checked against Nick Risinger's Sky Survey (http://skysurvey.org/)) but substantially enhanced.
I thought that a B&W rendition had a nice flare to it too - it shows the dark dust lanes more clearly:
28-05-2012, 09:31 PM
Lol Cam !
I see it as a mottled autumn leaf that has menifested in a galactic way :P
Great capture Dave The last color production is magic :cool:
28-05-2012, 10:15 PM
I've found some big differences in stacking between Maxim & PI, so not surprised you've had some issues with DSS.
The new version is very impressive - it certainly pops. Nonetheless, I couldn't help but notice there is a green cast across the image, especially in the lower right corner.
I've taken the liberty (hope you don't mind) of running it through the HLVG plug-in I was telling you about previously.
28-05-2012, 10:25 PM
28-05-2012, 10:25 PM
Awesome image BTW
28-05-2012, 11:10 PM
DT - Cheers! That is certainly a big improvement with the green cast gone. I think the bright blue that's left in the bottom-right is a bit "off", but I'll leave that for another day. Thanks for reminding me about HLVG.
Side note: shooting at ISO 200 x 12 min was a mistake here, because the non-diffracted stars bloomed and added a lot of red noise. I should have stuck with ISO 1600 x 1.5 mins.
Narayan - Thanks! Yep, it was autoguided with an Orion Mini Guider + QHY5 + PHD.
29-05-2012, 01:58 PM
Here's the Kiwi! ;)
02-06-2012, 10:14 AM
Aah, I see it now, Cam... I guess I'm not culturally trained to look for kiwis! :P
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