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Lunt LS100FHa2/B600 100mm H-Alpha Etalon-Filter-System with B600 Blocking Filter for 2-inch Focusers
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Lunt 50mm tunable H-alpha filter with 18mm blocking filter for scopes under 1800mm focal length | Astronomics.com
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APM Telescopes. 60mm H-alpha double-stack solar filter, for all LS60FHa filter-systems and LS60THa/LS60MT telescopes
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Lunt LS100FHa2/B1200 100mm H-Alpha Etalon-Filter-System with B1200 Blocking Filter for 2-inch Focusers
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