Wide field Orion
Feb 22, 2021 23:10:39 #
I was trying out a Sigma 120-300mm f 2.8 to see how it works on widefield astro shots. This is at 120mm f4 stack of 11x1.6 sec. I didn't have the energy to set up the scope.
Feb 23, 2021 03:11:46 #
alberio wrote:
I was trying out a Sigma 120-300mm f 2.8 to see how it works on widefield astro shots. This is at 120mm f4 stack of 11x1.6 sec. I didn't have the energy to set up the scope.
Certainly shows potential.
Sigma are generally good lenses
Feb 23, 2021 10:13:04 #
Marc G wrote:
Certainly shows potential.
Sigma are generally good lenses
Sigma are generally good lenses
This is a first generation lens, no tracking, but not yet convinced it's good for this application. I might need to experiment more.
Feb 23, 2021 13:33:19 #
Ballard
Loc: Grass Valley, California
alberio wrote:
I was trying out a Sigma 120-300mm f 2.8 to see how it works on widefield astro shots. This is at 120mm f4 stack of 11x1.6 sec. I didn't have the energy to set up the scope.
The stars came out very well even at the corners of the field. You got the flame nebula and some blue nebula around the brighter star below it. Couldn't quite make out the horsehead nebula which would be to the right and just below the star with a bit of blue nebula around it.
Feb 23, 2021 13:46:27 #
Ballard wrote:
The stars came out very well even at the corners of the field. You got the flame nebula and some blue nebula around the brighter star below it. Couldn't quite make out the horsehead nebula which would be to the right and just below the star with a bit of blue nebula around it.
The Horseheads would be beyond my expectations with this lens. Maybe with more subs and a filter. I think it also has more CA than I like, but thats why they make quality telescopes and lenses. Thanks for your comment. Also my processing skills are in need of improvement.
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