ALPINE ASTRONOMICAL Baader Planetarium Double-Stacked Ca-K Solar Imaging Filter (1.25")

ALPINE ASTRONOMICAL Baader Planetarium Double-Stacked Ca-K Solar Imaging Filter (1.25")

ALPINE ASTRONOMICAL Baader Planetarium Double-Stacked Ca-K Solar Imaging Filter (1.25")

B&H # ALCAK MFR # CAK
ALPINE ASTRONOMICAL Baader Planetarium Double-Stacked Ca-K Solar Imaging Filter (1.25")

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Product Highlights

  • For Solar Imaging in Calcium K-Line
  • 8nm-Wide Bandpass, Centered at 395nm
  • Reveals Super-Granulation and Flares
  • Use with 1.25" Imaging Accessories
  • No Aperture or Focal Length Limits
  • Front Energy Rejection Filter Required
  • 8x11" AstroSolar Photo Film Included
  • Not Safe for Visual Solar Observation
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SAFETY FIRST: Observing the Sun without the proper protection may result in serious personal injury, including permanent eye damage and blindness, and/or damage to equipment. Never point an optic at the sun without an approved solar filter on the front of the optic. For direct solar viewing, viewing the sun through an optic, or when using cameras with an optical viewfinder, ensure your filter is ISO 12312-2 (also written as ISO 12312-2:2015) certified. Never use photographic neutral density filters for direct solar viewing, viewing the sun through an optic, or when using cameras with an optical viewfinder.

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  • 1Description

Designed to be used with telescopes of virtually any aperture or focal length for capturing pictures of the sun, the Alpine Astronomical Baader Planetarium Double-Stacked Ca-K Solar Imaging Filter has standard filter threads that fits onto conventional 1.25" eyepieces for projection photography, and astrophotography imaging systems and accessories to improve resolution and reveal solar features such as super-granulations and flares. Employing special coatings in a double-stacked configuration, Alpine is able to isolate a 8nm wide bandpass centered on the Calcium K-line wavelength of 395nm. In addition to imaging the sun, the filter's narrow bandpass enables imagers to record Venusian cloud structures.

For proper use, Alpine recommends a front energy rejection filter (ERF) be employed to deflect radiation and heat from entering the lightpath. It's for this that they include an 8x11" sheet of Baader AstroSolar neutral density 3.8 photo film. This material can be mounted on most telescopes using the on-line instructions for fabricating your own filter housing, located on the Alpine Astronomical website. Standard ERFs may also be used, including Alpine's Baader Safety Herschel Prism.

Safe Use and Handling
  • This filter is intended for imaging purposes ONLY. It should not be used for visual observation as there is no ultraviolet (UV) radiation blocking and severe eye damage can result.
In the Box
ALPINE ASTRONOMICAL Baader Planetarium Double-Stacked Ca-K Solar Imaging Filter (1.25")
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description
    Size 1.25"
    Bandpass Calcium K-line; 395 nm
    Use Solar imaging only
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