Sun in h-alpha (spectroheliogram)
Taken by Richard Schrantz on March 21, 2024 @
Nicholasville, KY USA
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Details:
Here is the sun today in h-alpha using my new homemade spectroheliograph based on a 102mm f/7 APO. Pentax 150mm collimating and camera lenses from the 1960's, ASI183mm camera. Thorlabs 2400 groove/inch diffraction grating, custom 9-micron slit. Full resolution.
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