Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: MarkS on Aug 28, 2008, 13:15:45

Title: Yet another M31
Post by: MarkS on Aug 28, 2008, 13:15:45

M31 last night.  6th clear night in a row at Riberac!

20 x 5min.  300mm lens on modified EOS 350D, F5.6 ISO 800.  Binned by factor of 2 and cropped.

As before, this just a preview.  I'll give it more sympathetic processing when I get home.

(http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/androm270808.jpg)
Title: Re: Yet another M31
Post by: JohnP on Aug 28, 2008, 13:42:43
Mark - I'm jealous - you have certainly got tons of reprocessing to do when you get back...

Great shot & nice tight stars...

John
Title: Re: Yet another M31
Post by: Mac on Aug 28, 2008, 14:12:50
Quote6th clear night in a row at Riberac!

Thats nothing, we've just had our 107th cloudy night in a row, beat that. :lol:

I like the detail in the dust lanes,

I suppose thats the advantage of clear and unlight poluted skies.

Dont forget bring the clear skies when you return.



Title: Re: Yet another M31
Post by: Carole on Aug 28, 2008, 14:13:28
Fabulous, you can see the arms of the spiral.

You have a good Astronomical place down there Mark.

Carole
Title: Re: Yet another M31
Post by: RobertM on Aug 28, 2008, 14:24:28
Nice one Mark.  The stars are a bit elliptical - is that the way the subs have been stacked ?

I must admit it's always a bit depressing looking at the satellite images and seeing those clear skies just over the channel, at least someone is taking good advantage...
Title: Re: Yet another M31
Post by: Fay on Aug 28, 2008, 14:43:05
I'm jealous too, Mark!
Title: Re: Yet another M31
Post by: Daniel on Aug 28, 2008, 14:50:20
Wow, that really is gorgeous, love the detail you've retained around the edge of the galaxy, so hard to see that without blowing out the core!
Title: Re: Yet another M31
Post by: MarkS on Aug 28, 2008, 15:37:09
Thanks for the comments.

Ambient temperature was 18C.  So I'm hoping this camera will produce some excellent results in the Winter ...
Title: Re: Yet another M31
Post by: Mike on Aug 28, 2008, 15:44:36
Really lovely image mark. Like the dust lanes.
Title: Re: Yet another M31
Post by: Fay on Aug 28, 2008, 15:46:23
Mark, can you now come home, please, we are envious of all these good images!
Title: Re: Yet another M31
Post by: Daniel on Aug 28, 2008, 16:35:46
That reminds me, I really need to send off for a new passport and provisional driving license!!!
Title: Re: Yet another M31
Post by: MarkS on Sep 03, 2008, 06:23:53
Processing this is still a work in progress.  Raw data is 38 x 5min taken with a 300mm lens on the modified Canon EOS350D at F5.6

I need to get rid of those unsightly red haloes around the bright bloated stars.  They do appear in each sub but I suspect they're due to some lens deficiency.

Other then that, I'm pretty much happy with both the overall colour balance and the detail/contrast in the dust lanes.

http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/andromv3.jpg
Title: Re: Yet another M31
Post by: Fay on Sep 03, 2008, 07:53:02
That's nice Mark. I intended to do it myself last night. Must have been mad setting up in a hurricane............& taking it down 20 minutes later!  Could not get the DMK working with PHD anyway.


Fay
Title: Re: Yet another M31
Post by: MarkS on Sep 03, 2008, 16:12:06

Yes, it was windy last night.  At the Observing Evening we saw a lot of fast moving clouds (and it was chilly!).
Title: Re: Yet another M31
Post by: MarkS on Sep 03, 2008, 21:54:57

Finally finished processing.  This is about the best I can do.  1280x1024 so I can use it for desktop wallpaper  8)

(http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/androm270808~0.jpg)
Title: Re: Yet another M31
Post by: JohnP on Sep 04, 2008, 07:20:12
Nice one Mark - Very smooth in deed - must be dark skies... John
Title: Re: Yet another M31
Post by: Fay on Sep 04, 2008, 08:11:34
A great image Mark!
Title: Re: Yet another M31
Post by: MarkS on Sep 04, 2008, 09:52:38
I said I'd finally finished processing but I was wrong - it was impossible to resist continuing to tinker with the image.  I subsequently managed to tease out detail even further from the core.  Will post tonight.

[Added Later]  Forget it.  After another couple of hours of tweaking and then comparing side by side it is actually no better ...