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Baader Planetarium Ultra Narrowband 4.5 nm OIII CCD Filter - 50 mm Round - FOIIINU-RD50

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Baader 50 mm Round Ultra Narrowband 4.5 nm OIII CCD Filter

Baader Planetarium Ultra Narrowband filters provide users with an introduction to exceptionally narrow OIII CCD imaging at 4.5 nm. Optimized for use with telescope systems featuring focal ratios between f/8 and f/3, this particular premium grade filter comes in a round, 50 mm threaded cell. Blocks IR while also eliminating halos, reflections, and ghosting. Contains sealed edge coatings that will not deteriorate over time.