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H-alpha shots under moonlight

ATM Astrophotography
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#1 Dave Kodama

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Posted 25 November 2021 - 12:26 PM

Here are a couple of shots taken with an IDAS narrowband H-alpha filter and a modified Canon RP on a Borg 107F3.9 scope under close to full moon conditions.  These probably could be a little better on a cooled monochrome astrocamera, but are good enough for me to eliminate the moon as an excuse for not going out to shoot astrophotos.  :)

 

https://astrocamera..../1114/index.htm -- Horse Head / Flame Nebula region

 

https://astrocamera..../1121/index.htm -- California Nebula

 

Dave

 

 

 

 

 

 


  • F.Meiresonne, Achernar, mikewayne3 and 4 others like this

#2 Achernar

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Posted 25 November 2021 - 12:57 PM

Impressive, especially in light of the sky conditions you had to work with.

 

Taras



#3 DubbelDerp

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Posted 25 November 2021 - 01:08 PM

Great images! And a nice example of how we can be too concerned about the Bayer matrix to try shooting narrowband with a DSLR. Good job!

#4 F.Meiresonne

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Posted 25 November 2021 - 04:46 PM

amazing!

 

What was the exposure time? Dithering distance in pixels? Howmany subs?

 

Had a hard time on my soul, pattern noise, problably dithering not enough...and not enough subs.

 

Took 10 min subs, tend to lower that to get more subs...dunno, i have no experience, it was only my second try with a mono DSLR.



#5 Dave Kodama

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Posted 25 November 2021 - 05:03 PM

The detailed info is on the web pages with the images, but to summarize:

 

   Horse head area: 41 x 5 minutes, ISO 1600, modified Canon RP, Borg 107F3.9

   California nebula: 36 x 5 minutes, ISO 1600, modified Canon RP, Borg 107F3.9

 

No dithering used.

 

Was your camera modified for H-alpha?

 

Dave



#6 whwang

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Posted 25 November 2021 - 06:01 PM

Hi Dave,

 

Nice to see you here.  Those are great shots.

I also sometimes take H-alpha under moonlight with modified cameras.

It's a good way to boost the red nebulas.

 

Cheers,

Wei-Hao



#7 Dave Kodama

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Posted 25 November 2021 - 06:56 PM

Nice to hear from you!  I'm glad to hear you're still actively imaging.

 

Dave



#8 Achernar

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Posted 26 November 2021 - 10:07 AM

Hi Dave,

 

Nice to see you here.  Those are great shots.

I also sometimes take H-alpha under moonlight with modified cameras.

It's a good way to boost the red nebulas.

 

Cheers,

Wei-Hao

Not to mention expand your opportunities for imaging. Where I am, frequent clouds, rain and in the warmer months tropical systems makes it necessary to take every opportunity you can.

 

Taras




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