Narrowband Filters

Brand new 4nm F/3 Ultra Highspeed Narrowband filters by Baader. Available in Ha, Oiii and Sii in a variety of sizes.

Baader O-III Ultra-Narrowband Filter – Premium Grade. 4nm FWHM recommended for optical systems from f/10 to f/3.5. For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail

Baader S-II Ultra-Narrowband Filter – Premium Grade. 4nm FWHM recommended for optical systems from f/10 to f/3.5. For highest contrast even at strongest light pollution.

Baader S-II f/2 Ultra-Highspeed Filter – Premium Grade. 4nm FWHM, recommended for extremely fast optical systems from f/3.4 to f/1.8. Specially designed for the special filter requirements.

Brand new 4nm F/3 Ultra Highspeed Narrowband filters by Baader. Available in Ha, Oiii and Sii in a variety of sizes.

The EXPLORE SCIENTIFIC H-Alpha filter uses the characteristic of the so-called emission nebulae. These objects glow in certain colors, the so-called emission lines.

The EXPLORE SCIENTIFIC S-II filter uses the property of the so-called emission nebulae. These objects glow in certain colors, the so-called emission lines.

Baader O-III f/2 Ultra-Highspeed Filter – Premium Grade. 4nm FWHM, recommended for extremely. Specially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs

Baader H-alpha Ultra-Narrowband Filter – Premium Grade. 3.5nm FWHM to harmonize the exposure time from H-alpha with O-III / S-II), recommended for optical systems from f/10 to f/3.5. For highest contrast even at strongest light pollution

Brand new 4nm F/3 Ultra Highspeed Narrowband filters by Baader. Available in Ha, Oiii and Sii in a variety of sizes.

The Antlia H-alpha EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD 5) on unwanted wavelengths and the excellent transmittance characteristics found in the Antlia 3nm Pro.

Antlia OIII 4.5nm EDGE filters are designed to deliver 85% transmission at the 500.7nm line that provides you with the maximum signal to reveal the faintest OIII nebulae structures.

High transmittance for working with both long focal ratios and fast optical systems (as fast as f/3 or maybe even f/2.8)!

Baader H-alpha f/2 Ultra-Highspeed Filter – Premium Grade. 3.5nm FWHM (to harmonize the exposure time from H-alpha with O-III / S-II), recommended for extremely fast optical systems from f/3.4 to f/1.8

This H-alpha Filter is suitable for imaging of Hydrogen nebulas from observation sites with light pollution and from dark sites as well. The FWHm of 12nm is optimized for typical DSLR cameras with CMOS sensors and CCD cameras with a normal/high dark current.

This Astronomik OIII-CCD Filter is suitable for imaging of OIII nebulas from observation sites with light pollution and from dark sites as well.