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The Narrowband series offers line filters with a full width at half maximum of 6.5 nanometres, recommended for optical systems with an aperture ratio of f/10 to f/3.5.

Most telescopes used by amateurs fall within this wide range of recommended aperture ratios. The full width at half maximum is also suitable for optics with a smaller aperture and represents very good value for money.

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Baader Filters H-Beta CMOS Narrowband 2"
Baader
Filters H-Beta CMOS Narrowband 2"
$ 332.00
ready for shipping in 1-2 weeks
Baader Filters SII CMOS Narrowband 2"
Baader
Filters SII CMOS Narrowband 2"
$ 257.00
ready for shipping in 1-2 weeks
Baader Filters H-Beta CMOS Narrowband 1.25"
Baader
Filters H-Beta CMOS Narrowband 1.25"
$ 208.00
ready for shipping in 24 h
Baader Filters H-alpha CMOS Narrowband 1.25"
Baader
Filters H-alpha CMOS Narrowband 1.25"
$ 157.00
ready for shipping in 1-2 weeks
Baader Filters OIII CMOS Narrowband 1.25"
Baader
Filters OIII CMOS Narrowband 1.25"
$ 153.00
ready for shipping in 1-2 weeks
Baader Filters Narrowband SII CMOS 1.25"
Baader
Filters Narrowband SII CMOS 1.25"
$ 151.00
ready for shipping in 1-2 weeks
Baader Filters OIII CMOS Narrowband 50.4mm
Baader
Filters OIII CMOS Narrowband 50.4mm
$ 310.00
ready for shipping in 1-2 weeks
Baader Filters H-Beta CMOS Narrowband 36mm
Baader
Filters H-Beta CMOS Narrowband 36mm
$ 242.00
ready for shipping in 1-2 weeks
Baader Filters OIII CMOS Narrowband 2"
Baader
Filters OIII CMOS Narrowband 2"
$ 259.00
Product can be shipped as of 18.06.2025
Baader Filters H-alpha CMOS Narrowband 2"
Baader
Filters H-alpha CMOS Narrowband 2"
$ 265.00
ready for shipping in 1-2 weeks
Baader Filters SII CMOS Narrowband 31mm
Baader
Filters SII CMOS Narrowband 31mm
$ 160.00
ready for shipping in 1-2 weeks
Baader Filters OIII CMOS Narrowband 36mm
Baader
Filters OIII CMOS Narrowband 36mm
$ 185.00
ready for shipping in 1-2 weeks
Baader Filters SII CMOS Narrowband 50x50mm
Baader
Filters SII CMOS Narrowband 50x50mm
$ 320.00
ready for shipping in 24 h
Baader Filters SII CMOS Narrowband 50.4mm
Baader
Filters SII CMOS Narrowband 50.4mm
$ 307.00
ready for shipping in 1-2 weeks
Baader Filters H-alpha CMOS Narrowband 50.4mm
Baader
Filters H-alpha CMOS Narrowband 50.4mm
$ 276.00
ready for shipping in 1-2 weeks
Baader Filters H-Beta CMOS Narrowband 31mm
Baader
Filters H-Beta CMOS Narrowband 31mm
$ 220.00
ready for shipping in 1-2 weeks
Baader Filters H-alpha CMOS Narrowband 36mm
Baader
Filters H-alpha CMOS Narrowband 36mm
$ 186.00
ready for shipping in 1-2 weeks
Baader Filters SII CMOS Narrowband 36mm
Baader
Filters SII CMOS Narrowband 36mm
$ 184.00
ready for shipping in 1-2 weeks
Baader Filters H-alpha CMOS Narrowband 31mm
Baader
Filters H-alpha CMOS Narrowband 31mm
$ 163.00
ready for shipping in 1-2 weeks
Baader Filters OIII CMOS Narrowband 31mm
Baader
Filters OIII CMOS Narrowband 31mm
$ 161.00
ready for shipping in 1-2 weeks
Baader Filters OIII CMOS Narrowband 50x50mm
Baader
Filters OIII CMOS Narrowband 50x50mm
$ 321.00
ready for shipping in 24 h
Baader Filters H-alpha CMOS Narrowband 50x50mm
Baader
Filters H-alpha CMOS Narrowband 50x50mm
$ 315.00
ready for shipping in 24 h