Narrowband Filters

Baader O-III Narrowband Filter – Precision Grade
6.5 nm FWHM, recommended for optical systems from f/10 to f/3.5. Reflex-Blocker™ hard coated and planeoptically polished

The H-Alpha 7nm filter is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light

Baader H-alpha Narrowband Filter – Precision Grade. 6.5 nm FWHM, recommended for optical systems from f/10 to f/3.5. Reflex-Blocker™ hard coated and planeoptically polished

Baader S-II f/2 Highspeed Filter – Precision Grade
6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 to f/1.8
Specially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs

Baader O-III f/2 Highspeed Filter – Precision Grade. 6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 to f/1.8. Specially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs

Baader H-alpha f/2 Highspeed Filter – Precision Grade. 6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 to f/1.8. Specially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs

Narrowband filters are used to create high contrast deep sky images of certain objects, mainly emission and diffuse nebulae (i.e. Veil Nebula, M42 Orion Nebula, North America Nebula, Horsehead Nebula) or planetary nebulae

The ZWO OIII 7nm narrowband filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm, which corresponds to OIII emission lines, blocking out all other light.

The ZWO SII 7nm narrowband filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation and imaging. It is suitable for visual observation on most emission nebulae

The Askar ColorMagic Duo-Band filter is a dual or triple bandpass narrowband filter designed for light polluted skies for COLOUR CAMERAS to maximise the output from your imaging time.

The H-Alpha 7nm filter is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light

L-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras.

Our novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters are perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems.

Our novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters are perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems.

Our novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters are perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems.

The EXPLORE SCIENTIFIC O-III nebula filter blocks all other colors (and thereby nearly all of the artificial light) and only the two emmission lines of the oxygen can pass the filter.