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MFR Coating: 12nm filters work down to f/1
Baader Steeltrack
Ideal for hands-free exploring
Antlia PRO Ultra Narrowband 3nm H-alpha Filter - 1.25" for Imaging rotating focuser telescope Just arrivedAntlia H Alpha (Ha) 3. 0nm PRO Ultra Narrowband Filter Mounted in 1. 25" Filter Cell (31. 8mm) Just arrived! Now these Antlia filters got even better! 3nm bandwidth instead of 3. 5nm! 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 extreme narrowness in bandwidth enables Astro
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