Alpine Astronomical Baader 6.5nm Narrowband Filter Set (2") FCSETN-2
$759.00
[Pre Order - allow extra time] Alpine Astronomical Baader 6.5nm Narrowband Filter Set (2") 3 Filter Set: H-alpha, O-III, and S-II, For f/10 to f/3.5 Optical Systems, CMOS-Optimized / Suitable for CCD, 6.5nm FWHM, Reflex-Blocker / Life-Coat, Blackened...