The 6nm filters are particularly well suited if you are using a modern, cooled camera with very low dark current or taking pictures from a location with severe light pollution. The strong suppression of the sky background allows you to use longer exposure times and achieve detailed and high-contrast images.

All our 6nm Narrowband-Emissionline filters are also available as MaxFR-Filters for use with fast optical systems.

In addition, the 6nm filters are available in all standard sizes, as we offer mounted filters in threaded cells, filters without threads in a protective ring as well as Clip-Filters for use in modern DSLR and system cameras.

Astronomik MFR and MaxFR coating

The MFR coating ensures that Astronomik Narrowband-Emissionline filters can be used with almost all instruments. This means you don’t have to buy different filters for different focal ratios, as it is the case with most competitors. Unlike filters from other manufacturers, which often require special “high-speed” versions, Astronomik’s MFR filters keep their transmission properties with both fast and slow optics.

Astronomik has developed the MaxFR coating for extremely fast optical systems such as the Celestron RASA and Takahashi Epsilon Astrographs.

Both the Astronomik MFR and MaxFR coatings offer needle-sharp stars, extremely high contrast, minimized stray light, no halos and the best possible blocking across the entire spectral range from UV to IR.