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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.

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

Increased contrast, matched for typical CMOS quantum efficiency and s/n ratio. Reflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics

The Astronomik CLS CCD is suitable under light-polluted skies for DSLR Cameras, which have been remodeled for astronomical use. The filter enhances the contrast between all deep-sky objects and the background.

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

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 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)!

Astronomik has added a new range of RGB filters to its line of World class products. The new Deep-Sky RGB filters are designed for maximum deep sky imaging performance with CCD cameras.

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

The LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter set divides the spectrum into its components red, green, blue and luminance.

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, planetary nebulae and supernova remnants