Orion Constellation - the Jewel of the Winter Sky
Posted 08 December 2012 - 06:52 PM
High Resolution Version and more image information available at http://www.astronome...php?c=159&p=472
This is my first image where I successfully blended RGB and Ha data and it turned out to be quite a learning experience. The image is a 50mm widefield image using an Olympus f/1.8 50mm prime lens at f/4, Baader modified Canon 450D piggybacked on my C-8 and Schaefer mount. The image is made from stacks of 147 x 3 minute RGB subs (7 1/3 hours) and 18 x 10 minute Ha subs (3 hours) using an Astronomik 6nm Ha clip filter. Guiding was with an ONAG On-axis Guider, Lodestar autoguider, and Phd Guiding.
Thanks for looking!
Posted 08 December 2012 - 07:32 PM
Posted 08 December 2012 - 10:35 PM
Posted 09 December 2012 - 01:49 AM
Posted 09 December 2012 - 01:50 AM
Posted 09 December 2012 - 08:03 AM
Posted 09 December 2012 - 09:51 AM
Very nice work, thanks for sharing.
Posted 09 December 2012 - 11:23 AM
Posted 09 December 2012 - 02:32 PM
Posted 09 December 2012 - 03:42 PM
Posted 09 December 2012 - 06:10 PM
Posted 09 December 2012 - 06:35 PM
Posted 09 December 2012 - 07:28 PM
@Pete - yes, I used the Fotodiox adapter. For focusing, I used Images Plus' focusing (where it snaps a sub every few seconds). I focused at f/1.8 (where the lens has less depth of field) and then stopped it down to f/4 when imaging. This helped to ensure sharp focus (increased depth of field). It was a bit tricky to focus because there's no fine adjustment on the lens, and I didn't have anything to adapt a Robofocus or other fine focuser to the lens. Focusing the Ha was even more fun - a 6nm filter doesn't make for a very bright image.
@Gary - you forced me to learn something today. I didn't even realize that there was a cluster at Orion's head. So now I know that is a cluster and its named Collinder 69 - thanks for the education!
@John - the ONAG is great. It obviously wasn't critical for this shot, but it makes prime focus imaging a breeze - guiding through the primary optics while finding bright guide stars is easy. Its not cheap, but I think it was one of my best astrophotography upgrades.
Thanks again everyone.
Posted 10 December 2012 - 07:17 PM
Posted 11 December 2012 - 10:20 AM