View Full Version here: : NGC 7239 the Helix.
20-05-2012, 01:33 PM
Thought it was time to try my hand at some planetary nebula, imaged the helix and the dumb bell.
The helix obviously requires a lot of data,I did one hour thirty five minutes, probably needs twice that. Still I'm happy with my first attempt.
Telescope 8” f/4 astrograph on a HEQ Pro 5 mount, orion mini guider.
Unmodded Canon 1100D at ISO 800.
19 x 300 sec subs ISO 800,
24 dark frames, 16 flat frames and 11 bias.
Stacked in DSS and post process in Phototshop.
20-05-2012, 01:54 PM
Not Bad Justin
Not bad at all ;)
20-05-2012, 02:16 PM
Still amazes me how different DSO's require a different approach with processing.
20-05-2012, 02:34 PM
Very nice Justin. You are turning out some good views with your set-up. All the best.
20-05-2012, 03:11 PM
Looking good Justin. You've got some nice colour there.
20-05-2012, 03:15 PM
Great shot and love the processing
20-05-2012, 03:56 PM
20-05-2012, 09:01 PM
A beautiful photo Justin.
21-05-2012, 05:39 PM
Thanks for the comments.
I'm going to try some of these planetary nebula with a 2 x barlow, don't know whether it will help but worth a go.
21-05-2012, 09:49 PM
Nice :) Looks like you've been on a bit of a roll lately!
21-05-2012, 10:57 PM
Beautiful. My first helix was nowhere near that good. Awesome shot!
22-05-2012, 03:53 PM
Hi Justin, nice attempt at this very difficult object.
I would like to suggest that you do subs around 10-15 minutes on this object. While it is quite large it is also reasonably dim, longer subs will present you with better signal. :)
22-05-2012, 04:22 PM
Nice colours :thumbsup:
Is it just me, but is there a large bluish (faint) ring around the Helix? :shrug:
22-05-2012, 05:51 PM
Thanks Dave, Erik, Paul and Dan.
One thing that concerns me a bit about that length exposure is star burnout, seems to be a problem with DSLR's.
Any suggestions on overcoming this?
22-05-2012, 06:25 PM
Justin you can take a series of shorter subs to mask in and control the star colour. That will control star burnout.
22-05-2012, 06:52 PM
Thats a Mighty Fine Result Justin :thumbsup: Can see hints of them fainter outer shells too, , Cool ! And some great inner detail, extra cool !
Are you using a CC with the image scope Justin ? The stars look very pleasing from your astrograph !
22-05-2012, 10:02 PM
For a first attempt, that's mighty fine for such a hard target. :thumbsup:
24-05-2012, 05:31 PM
Thanks Bob and Daniel.
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