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Astrodon - Narrowband 5 nm H-a > 90%T 65mm Square Filter for SBIG STX
Narrowband (NB) filters enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),
... Learn MoreFREE SHIPPINGModel#: HA5-65S(48 States)
$945.00
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