Prominence HA vs CA
Taken by Michael Karrer on September 16, 2023 @
Austria
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Details:
In calcium light, prominences are much fainter and more difficult to image. The clearer the sky, the better (that was not the case here). The difference in appearance is enormous!
5" Takahashi refractor stopped down to 100mm.
Photographer's website:
https://www.flickr.com/photos/michael_karrer
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