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The filters consist of ultra-thin layers on the substrate
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ANTLIA PRO Ultra Narrowband 3nm H-alpha Filter - 2" Guest Pager System The filters consist of ultra-thinAntlia H Alpha (Ha) 3. 0nm PRO Ultra Narrowband Filter Mounted in 2" Filter Cell (50. 4mm) Now these Antlia filters got even better! 3nm bandwidth instead of 3. 5nm! Description of the new PRO 3nm filters is under construction! The Antlia H Alpha (Ha) 3. 0nm filter is suitable for imaging H Alpha emissions from nebulae, planetary nebulae and supernova remnants. The 3. 0nm bandwidth delivers a high transmission at a centre wavelength of 656. 3nm. The
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