Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: MarkS on Jun 05, 2008, 20:34:43

Title: Another M57
Post by: MarkS on Jun 05, 2008, 20:34:43
M57 last night. 
72 min total exposure in 4 min subs.  Celestron C11 with F6.3 reducer, Astronomik CLS filter and Canon EOS 300D at ISO 800.  Guided with 300mm telephoto lens with Philips SPC900 webcam stuffed in the back.

The main reason for taking this image (and the planned M27) is to provide a basis for comparison once I've modded my Canon for H-alpha sensitivity.

The image is a straight crop of the original full size image.

(http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/m57_040608.jpg)
Title: Re: Another M57
Post by: RobertM on Jun 05, 2008, 22:13:31
That looks very good Mark, nice detail.  I also did M57 before the clouds rolled in but could only manage to get a few frames of LRGB.

PS, I like the tiny Krispie Kreem doughnuts...
Title: Re: Another M57
Post by: Rocket Pooch on Jun 06, 2008, 07:21:49
and when was it clear last night?  guiding seems to be working.
Title: Re: Another M57
Post by: Fay on Jun 06, 2008, 07:55:45
Did not see any clear, last night, Mark!

Very nice image Mark a good image to compare after your mod.
Title: Re: Another M57
Post by: MarkS on Jun 06, 2008, 08:30:49
Wednesday night - it was mainly clear from 11:00pm onwards ...

As for the "Krispy Creme Doughnuts" - that's a problem in my processing - need to re-process!
Title: Re: Another M57
Post by: RobertM on Jun 06, 2008, 08:56:40
Mark, It would be interesting to see how you process these images jic I do get a DSLR - any chance of posting a rough guide on what you do. 

Many thanks
Title: Re: Another M57
Post by: JohnP on Jun 06, 2008, 10:32:22
Mark - that looks nice - it'll be an interesting comparison - when do you expect to do your mod? RU going to document it. There are one or two in the society that are interested in this - I know Fay is & me & I think others. Might even make a good 15min talk at one of the members evenings with before & after pics etc.

John
Title: Re: Another M57
Post by: MarkS on Jun 06, 2008, 10:55:41
All the suppliers I've spoken to are waiting on Baader for further stock - ETA 1-2 weeks.

I intend to take a pre-modded image of M27 (Dumbbell) then I'll do the mod as soon as the new filter arrives.

Robert - I'm happy to describe my processing.  Happy even to give a talk at an imaging session or members evening.
Title: Re: Another M57
Post by: Mike on Jun 06, 2008, 11:08:39
Why not do a quick 15-20 minutes at the members meeting this month?
Title: Re: Another M57
Post by: MarkS on Jun 06, 2008, 14:57:31

Mike, I'm happy to give a talk at the members evening.   I'll PM you to clarify a few details first.
Title: Re: Another M57
Post by: Mike on Jun 06, 2008, 15:08:57
Sure I look forward to it.