M42 from Glebe

Zuts · #1 28-10-2007, 11:53 PM

Hi All,

M42 from Glebe

Meade ED80, EQ6, Astronomic UHC filter, EOS400D
No guiding

9 images 30 sec to 3 minutes

Converted to TIF in canon photo professional
Stacked in DSS, RGB set to square root, luminance set to zero
Levels in CS2

iceman (Mike) · #2 29-10-2007, 06:12 AM

Nice work again, lovely reds. Not sure if you clipped the histogram too much though? For 3 minute exposures, the running man should show up a bit more? Although being from light-polluted glebe could've had more to do with that

jase (Jason) · #3 29-10-2007, 09:43 PM

Paul, looking at the histogram it would appear the data could be stretch a little more. However, this will bring out more noise in the process. You'll need more data to circumvent this or investigate noise reduction techniques. The quality is improving from your previous posts.

Zuts · #4 31-10-2007, 08:42 AM

Quote:

Originally Posted by jase

Paul, looking at the histogram it would appear the data could be stretch a little more. However, this will bring out more noise in the process. You'll need more data to circumvent this or investigate noise reduction techniques. The quality is improving from your previous posts.

Hi Jase,

Thanks, i am slowly learning but its a long slow process. Glebe has horrible light pollution and i am trying various filters so far

Astronomic UHC, darkens the background nicely but lets in less light so have to image longer.

Orion Skyglow, more light but the sky has a torquoise tinge and reflections around stars.

BAADER Skyglow, very dissapointing for imaging. I just got it and sky goes lime green and still lots of light pollution.

The best so far seems to be the astronomic. Any other suggestions?

Thanks Paul

Ric · #5 31-10-2007, 10:48 AM

Hi Paul, I think you have done well with M42. I used to live in Waverley out in the eastern suburbs in the early 80's and I thought it was bad then. I hate to think of what it's like now.

Have you thought of narrowband imaging in Ha, OIII etc.

Cheers

leon · #6 31-10-2007, 11:02 AM

Good job Paul, yep, it sure takes a while to get it right, but we all get there eventually, a big learning curve, I know, I'm in the middle of it, well done by the way.

leon