My first attempt at Hydrogen Alpha photography

[Pikaia]

Orion (North at right). 130 x 30"" subs, Sony A7R full spectrum with Astronomik H-Alpha clip-in filter, Sony 90mm macro lens at f2.8. Processed in AstroPixelProcessor and ON1. Bortle 7.

I was pleased to see so much more information than when I use an unmodified camera with no filtration. Unfortunately the framing was not quite how I wanted it, I found it hard to identify stars on the viewing screen, even though they were not too difficult to see. There is also a lack of stars between Betelgeuse and Orion's belt, which I do not understand.

[Graeme1858]

Excellent Ha first light.

Graeme

[pakarinen]

Nice! Keep 'em coming!

[Ylem]

Very Very nice!

[StarHugger]

Very nice, Ha is a ghostly art at night in mono...

Awesome start !

[AstroBee]

Nice first go at it.
I find it interesting that Barnard's Loop sort of disappears in the upper left of the frame though. It should extend and curve all the way out of that frame.
Here's a reference shot, not my own work.
https://www.reddit.com/r/astrophotograp ... p_sh_2276/

[Pikaia]

Nice first go at it.
I find it interesting that Barnard's Loop sort of disappears in the upper left of the frame though. It should extend and curve all the way out of that frame.

Thanks for the comment. On the stacked image the fainter part of the loop disappears into the light pollution so there is little that I can do about it, other than add more data. It is not always clear what is LP and what is real data.

[AstroBee]

Ha should cut through virtually all light pollution.

[messier 111]

nice shot , thx .

[Pikaia]

Ha should cut through virtually all light pollution.

My 12nm filter lets through 4% of the visible spectrum (400 to 700nm), so it eliminates around 96% of LP. However, in Bortle 7 that still leaves a considerable amount that gets through! This not helped by the fairly low altitude of Orion at my latitude of 53.5 degrees.