Sh2-1 Closeup

[Andy Nowlen]

Between Work and Life, I finally had the chance for clear nights and a clear calendar!! During the June 2024 new moon I spent 3 nights at one of my favorite dark sky sites in Central Oregon. It is a B1/B2 area and has a great horizon. I took the chance to shoot a target pretty low on the southern horizon. It is not a target I can get from home.

Just in time for that trip, I purchased the Askar C1 filters - HaOiii and OiiiSii. They are available in my price range and have proved to be good, but of course, not like other high-end versions. In the end result, there are halos, as one might expect. Some can be dealt with while others must be lived with!!

8.25 hours integration
AsiAir 533mc pro
Sharpstar 76mm @ 335mm
AsiAir
Pixinsight
Photoshop

 

[JimFox]

Hey Andy!

I am glad you got some time away to image. I had some clear skies but had to drive from Colorado to California, and I just spent all day yesterday photographing a wedding.

I really like what you got here, and I like the color separation. I appreciate your thoughts on the Askar filters as I have seen them advertised and wondered how well they performed.

 

[Andy Nowlen]

Hi Jim,
So far I really like the Askar C1 filters. I was surprised by how much O3 was revealed by the O3S2 filter. I have another project going in which I will combine the results from each filter. I hope to make time for that before too long. One thing I am amazed at ----- These filters actually work in my C11 Rasa. There is not a big problem with fringing etc. A very great deal for these inexpensive filters!

I think the image above really should be shot even wider than I am able to. I actually have a Rokinon 135mm but have not been able to get it to focus on stars at or closer to infinity. I'm not sure what I am going to do with it.

 

[Mike Lewis]

Andy,

Cool to see results from those filters, I had just heard of them myself as I start to put my tiny travel OSC astro rig together. I guess there are also even narrower versions of these, obviously for more money. Looking at your results it would seem the C1s are quite good though. I hope to see you post more using these filters soon.

ML