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The Sun July 20th 2016; AR2567 & AR2565 (comparison continuum and H-Alpha)


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Hi all,


Very nice and sunny day yesterday, seeing pretty good aswell! This combined image shows AR2567 & AR2565 with 2 very different etalon tunings.

Tuning the etalon as far as possible off-band, a near continuum white light is achieved (granulation also showing). The images were made +/- 5 minutes apart,

and clearly show very different details in each.


Camera was a DMK31, made with 150mm pst mod Solar scope.

Thanks for checking them out!


Best Regards,



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3 hours ago, Radec said:

Excellent images & a very interesting comparison.

Is this a single stack etalon? What's the mod if you don't mind me asking?

Thanks for checking it out, glad you like it! 

Yes, it is a single stack etalon. Kind of hard to explain in two sentences on my phone now... But you can find some details concerning the scope here: 


Let me know if you want more info...





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