Image of the day

Captured by
Byron Davies

Sh2-86 (NGC-6820)

My Account

New to Astromart?

Register an account...

Need Help?

a webcam planetary

Started by Alan Friedman, 09/06/2005 07:45PM
Posted 09/06/2005 07:45PM Opening Post
Hi all-

Hope you don't mind the brief step outside the solar system -

I've been wanting to try using my B&W webcam on a small bright deep sky
object and had a first opportunity from the dark skies of Cherry
Springs State Park and Black Forest Star Party last weekend.

The skies were very dark - the seeing quite unsteady with much
scintillation. The luminance image is made by stacking streams with 30 second exposure frames (max for the DMK21BF04) - a total integration of about 45 minutes using the 10" mak/cass at f9.8. The video frames were surprisingly low in noise - some hot pixels (of
course I forgot to do a dark frame) and a little amp glow were removed in Photoshop. I shot RGB frames using the traveler which was piggybacked on the 10" and 1200 mount. The low res color images were pretty hard to work with - I had to do a substantial amount of color
tweaking in Photoshop.

I haven't done any deep sky work in quite a few years. For processing I used my planetary techniques in Photoshop. I was surprised and pleased that the webcam could do such a decent job.

best,
Alan

Attached Image:

Alan Friedman's attachment for post 26609

Alan Friedman

http://www.avertedimagination.com
Posted 09/06/2005 08:26PM #1
Alan,

Wow! That is impressive. It makes me want to give DSO a try. Of course I'm still trying to figure out the best exposure technique for the satelites of Mars... grin

Paul Maxson
Moderator - CCD Imaging and Processing/Solar System
Celestron C14, Mewlon 250, Orion EON120, ASI120MM, Flea3.
http://www.sunspot51.com
Posted 09/06/2005 09:05PM #2
Hi Alan,

It seems you excel at any type of imaging you try, wonderful image!

Clear skies,
Ed Roach
Posted 09/06/2005 09:05PM #3
Robert Heffner said:

Btw, we used to have a cabin in the mountains of Potter County north of Cherry Springs. The area definitely lives up to its name of God's Country. I was not into astronomy back then but I do remember the incredible darkness of the night sky.

Looks like you had a great time at Cherry Springs.

The Black Forest Star Party is a really nice event and pretty close - 125 miles from Buffalo. It must have been great to have a weekend retreat nearby. I love the couple of nights of camping and am glad to have the company of astronomy friends when the coyotes start howling in the middle of the night!

Alan

Alan Friedman

http://www.avertedimagination.com
Posted 09/07/2005 02:00PM #4
Superb result Alan!! I've nevr been a fan of webcam images of DSO's but I think for high surface brightness planetaries they may be just the ticket!
I wish my Starmaster was on a eq tracking platform I bet I could get some dandy images with the new Infinity camera with a bunch of unguided 30 second shots!

--Mike
Posted 09/07/2005 04:20PM #5
Hello Alan. Interesting experiment and great results too especially for a first time. Processing is great as usual: even if the technique is the one you use with planetary images, you've got a good eye and always manage to avoid overprocessing grin

Congrats again Alan

Ciao
Luca 8)

www.amun-ra.org
Solar Imaging Website
Posted 09/07/2005 07:38PM #6
Hi Alan,

Beautiful image, very well done IMO

Thanks,

Wes Higgins