Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: Mac on Aug 24, 2009, 14:29:34

Title: M27 Dumbell DSC.
Post by: Mac on Aug 24, 2009, 14:29:34
 :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy: :cheesy:
Finally nailed the guiding.
Cheers Robert for the advice, on setting the guiding up and the processing.

And here is the results. :lol:

6 * Lu at 5min guided.
3 Ha @ 5min   Red
2 Hb @ 5min   Blue
1 Oiii @5 min   Green

i still need to do more subs on the ha, hb & oiii but the result is ok.
(http://www.macrhon.co.uk/website/oasphotos/Dumbell-LRGB.jpg)

Mac, 8)





Title: Re: M27 Dumbell DSC.
Post by: JohnP on Aug 24, 2009, 14:44:57
Looking good Mac my man.... Stars are nice and round. So was this using the camera lens & adaptors that we sorted out...? There will be no stopping you now.....

Good job,  John
Title: Re: M27 Dumbell DSC.
Post by: Mac on Aug 24, 2009, 14:49:28
QuoteSo was this using the camera lens & adaptors that we sorted out

aye that it was.
Robert sorted the guiding out by increasing the slew time so that the image moved far enough.
Title: Re: M27 Dumbell DSC.
Post by: Fay on Aug 24, 2009, 14:59:34
Great result Mac, glad you are good to go!
Title: Re: M27 Dumbell DSC.
Post by: Daniel on Aug 24, 2009, 15:03:27
Awesome man, with more subs that'll be a cracker!

Daniel
:O)
Title: Re: M27 Dumbell DSC.
Post by: RobertM on Aug 24, 2009, 15:55:31
Great image Mac !

As some further suggestions in MaximDL try the following before DDP if you haven't already:

Get rid of any fine gradients:
    Filter->Auto Remove Gradient on each stacked channel.

Background looks a bit green to my eyes but it could be these contact lenses!
    Color->Colour balance - Background level = Auto and Scaling% = Mouse (click on a star but you may need to play around with this!)

Hope that helps
Robert
Title: Re: M27 Dumbell DSC.
Post by: Mike on Aug 24, 2009, 16:09:01
Very nice but not sure about the green background.
Title: Re: M27 Dumbell DSC.
Post by: Daniel on Aug 24, 2009, 16:10:58
Oh, and you could flatten the noise on the Background a little bit more by moving the brightness for the black point a little higher, I read about the technique in astrophoto insight magazine in an article by Noel Carboni, been using it on all my images lately, really helps flatten things.

Daniel
:O)
Title: Re: M27 Dumbell DSC.
Post by: Rocket Pooch on Aug 24, 2009, 18:08:38
Well done Mac your in business now :-)

I agree the green needs to come down a bit.

Chris
Title: Re: M27 Dumbell DSC.
Post by: MarkS on Aug 24, 2009, 20:58:10

Nice one Mac!  You've got good sharp stars there at 5 minute exposures - that guiding is working well.

Horrible green background and a few hot pixels but that's no problem at all.  Your data is very good so you'll be able enjoy experimenting with the processing to get a great looking image out of that.

Mark