Astronomik 12nm Narrowband Filters

The 12nm Astronomik Narrowband-Emissionline filters are ideal for use with typical DSLR and system cameras with CMOS sensors – and also work great with fast wide-angle lenses!

The Astronomik Narrowband-Emissionline filters with a Full-Width-Half-Maximum (FWHM) of 12nm are the most affordable version of the Narrowband-Emissionline filters. They are ideal if you want to get started in astrophotography on a limited budget. The gain in contrast and detail is enormous!

The 12nm filters are also the first choice if you are photographing with an older CCD camera with normal or high dark current or from a location with a dark sky. In areas with little light pollution, the background signal in the images is usually limited by the sensor’s dark current and not by light pollution. Further suppression of the sky background by reducing the FWHM does not bring out more details in the object.

The 12nm filters are also the preferred choice for cameras with integrated guiding sensor, as they show two to three times more guiding stars compared to 6nm and 4nm filters.

All our 12nm Narrowband-Emissionline filters are also available as MaxFR-Filters for use with fast optical systems. For astrophotography with ultra-wide-angle lenses, several 12nm filters are also available as XT-Filters with a particularly thin substrate, delivering sharp and crisp star images all the way to the corners of the image.

In addition, the 12nm 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.