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Astronomik H-Alpha 12 nm Pentax K1 Clip Filter - HA12-PENTAX

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SKU: ASF-HA12-PENTAX

Astronomik H-Alpha 12 nm CCD Filter - Pentax K-1 Clip

  • Made for astrophotography, this Astronomik H-Alpha 12 nm CCD Filter is presented in a Pentax K-1 clip format
  • Pentax K-1 clip filters are compatible with both MkI and MkII Pentax K-1 DSLR camera models
  • Made with regards for the highest technical standards to ensure the finest achievable optical performance for deep sky imaging applications
  • Simultaneously allows H-Alpha emissions to pass and blocks almost the entire remainder of the visual spectrum including IR
  • Approximate FWHM bandwidth of 12 nm
  • Ideally suited for planetary nebulae and supernova remnant imaging, this filter blocks all light from unwanted sources
  • German-designed for superior optical quality!


More About the Astronomik H-Alpha 12 nm CCD Pentax K1 Clip Filter

For CCD applications, this Astronomik H-Alpha 12 nm CCD Filter is the optimal narrowband filter. Its 12 nm full width at half maximum (FWHM) is perfect for standard CCD cameras, permitting the use of extremely fast optics. The f/number application range spans from 1:2.8 to 1:15. Transmission deficits and chromatic distortion, a problem with other filters, only happen with Astronomik filters when excessively bright 1:2 plus aperture ratios are involved. This filter features a transmission of up to 99%. Additionally, with this 12 nm filter, you'll find it easier to locate guide stars for cameras with an incorporated autoguider.

The Astronomik H-Alpha 12 nm Filter increases the contrast between objects, in this instance between objects with H-Alpha emission lines and the airglow background. In addition, this filter serves as an excellent light pollution filter by completely concealing the emission lines from artificial lighting sources such as those from sodium and mercury-vapor street lamps. Due to the Astronomik 12 nm H-Alpha substrate's high optical quality, you'll see the same razor sharp stars you'd see with a regular telescope.

Delivered in a superior quality, long-lasting plastic storage box, this H-Alpha 12 nm CCD Filter completely blocks out all undesired wavelengths in the visible light and IR spectral bands. As with all Astronomik filters, this filter is parfocal with all filters from Astronomik. Diffraction limited, it will not lessen the optical capabilities of your telescope. This filter is also highly resistant to blemishes caused by scratching, aging, and high humidity.

Astronomik Pentax K-1 Clip Filter System

Compatible with Pentax K1 and K1 Mk II digital SLR cameras, this Pentax K1 clip filter is the newest member of the Astronomik clip filter family. Does not support camera models with APS-C sensors! Astronomik clip filters are designed to be used with traditional camera lenses for use with telescopes.

Transmission Specifications


  • More than 97% transmission for the H-Alpha line
  • The complete rest of the visual spectrum is almost entirely obstructed \
  • Blocks undesired wavelengths in the infrared


Please note this filter must NEVER be used for solar observing or imaging. Doing so will cause permanent damage to your eyes.