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AR 12847 - AR 12849 Comparison Ca-K, H-alpha
salvolauricella
The Sun - Ca-K and H-alpha
salvolauricella
Lunt 40mm B500 ZWO ASI 120mm
Garnett319
H-alpha Two-image Composite, Double Stack
Howard Eskildsen
Sun - 13APR2019
jwestervelt
Prominence
Lunt Customer