Product series:
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.
Baader
Filters H-alpha/OIII/SII CMOS Narrowband 50x50mm
$ 860.00
ready for shipping in 1-2
weeks
Baader
Filters H-alpha/OIII/SII CMOS Narrowband 50.4mm
$ 810.00
ready for shipping in 1-2
weeks
Baader
Filters H-alpha/OIII/SII CMOS Narrowband 2"
$ 710.00
ready for shipping in 3-7
days