DSLR Trifid and Lagoon Panorama

rmuhlack (Richard) · #1 31-08-2014, 04:51 PM

This image of the Trifid and Lagoon Nebulae is a 3 frame panorama, with an integration time for each frame of approximately 6 hours. Optical alignment issues have resulted in some odd star shapes (as per the discussion in this thread) so I have reduced star sizes with Pixinsight's Morphological Transformation process before a 50% resize of the entire merged mosaic.

Tech Details:
Telescope: 130mm f5 newtonian
Mount: HEQ5 w EQMOD
Camera: DIY Peltier modded Canon 450D, with sensor at a nominal regulated 10 C (via cold finger)
Guide scope: Rubinar 500/8 with QHY5L-II
Software: SGPro and Pixinsight 1.8
Sub frames: 8 mins @ ISO1600

HI res here: http://www.astrobin.com/full/117306/B/

Comments/critique welcome

RickS (Rick) · #2 31-08-2014, 06:10 PM

Very nice, Richard. You've done really well with the reflection neb. Maybe a little green cast that could benefit from a touch of SCNR?

rmuhlack (Richard) · #3 31-08-2014, 06:25 PM

Thanks Rick. Just tried SCNR on this image and it becomes excessively blue, so instead i've dropped the green channel slightly using curves.

New hi-res: http://www.astrobin.com/full/117306/B/

RickS (Rick) · #4 31-08-2014, 06:31 PM

That looks better, Richard, but I'm surprised you didn't get a result with SCNR. Did you try tweaking the "Amount" parameter?

Cheers,
Rick.

rmuhlack (Richard) · #5 31-08-2014, 06:41 PM

Quote:

Originally Posted by RickS

That looks better, Richard, but I'm surprised you didn't get a result with SCNR. Did you try tweaking the "Amount" parameter?

Cheers,
Rick.

I must admit i hadn't noticed that SCNR even had an "amount" parameter. I've only ever applied it at the default 100%. oops....

applying SCNR at 50% achieves much the same result as I have posted here with my alternative green curve adjustment. guess i'll keep that in mind for next time...