Product series:
The Ultra-Narrowband series comprises line filters with a very narrow full width at half maximum, recommended for optical systems with an aperture ratio of f/10 to f/3.5.
Due to the low full width at half maximum, the filters allow maximum contrast even in severe light pollution conditions. They minimise the size of stars and thus make the finest details accessible – indispensable under Bortle class 9/8/7/(6) skies.
![Baader Filters OIII CMOS Ultra-Narrowband 50x50mm](/Produktbilder/normal/70884_1/Baader-Filters-OIII-CMOS-Ultra-Narrowband-50x50mm.jpg)
Baader
Filters OIII CMOS Ultra-Narrowband 50x50mm
$ 439.00
ready for shipping in 1-2
weeks
![Baader Filters OIII CMOS Ultra-Narrowband 50.4mm](/Produktbilder/normal/70883_1/Baader-Filters-OIII-CMOS-Ultra-Narrowband-50-4mm.jpg)
Baader
Filters OIII CMOS Ultra-Narrowband 50.4mm
$ 429.00
ready for shipping in 1-2
weeks
![Baader Filters OIII CMOS Ultra-Narrowband 31mm](/Produktbilder/normal/70880_1/Baader-Filters-OIII-CMOS-Ultra-Narrowband-31mm.jpg)
Baader
Filters OIII CMOS Ultra-Narrowband 31mm
$ 293.00
ready for shipping in 1-2
weeks
![Baader Filters OIII CMOS Ultra-Narrowband 1.25"](/Produktbilder/normal/70879_1/Baader-Filters-OIII-CMOS-Ultra-Narrowband-1-25-.jpg)
Baader
Filters OIII CMOS Ultra-Narrowband 1.25"
$ 272.00
ready for shipping in 1-2
weeks
![Baader Filters OIII CMOS Ultra-Narrowband 65x65mm](/Produktbilder/normal/70885_1/Baader-Filters-OIII-CMOS-Ultra-Narrowband-65x65mm.jpg)
Baader
Filters OIII CMOS Ultra-Narrowband 65x65mm
$ 590.00
ready for shipping in 1-2
weeks
![Baader Filters OIII CMOS Ultra-Narrowband 36mm](/Produktbilder/normal/70881_1/Baader-Filters-OIII-CMOS-Ultra-Narrowband-36mm.jpg)
Baader
Filters OIII CMOS Ultra-Narrowband 36mm
$ 351.00
ready for shipping in 1-2
weeks