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Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard
Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard
Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard
Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard
Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard
Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard
Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard
Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard

Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard

by Antlia
SKU ANT-SD-STANDARD
$149.00 USD - $149.00 USD
$149.00 USD
$149.00 USD - $149.00 USD
$149.00 USD
Price Match Policy!
  • Passes Ha (656.3nm), CaK (393.3nm), and CaH (396.8nm) wavelengths
  • Without extra light reduction, for refractors up to 100mm aperture only
  • Comes with an Antlia Energy Rejection Filter (ERF); ND filter factory-installed in the tube
  • Compatible with both 1.25" and 2" adapters
  • Fully closed tube, CNC machined from aircraft aluminum and oxidized
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Antlia Solar Discover Dualband Ha CaK and CaH Filter Assembly - Standard

    The Antlia Solar Discover Dualband Filter Assembly is designed specifically for solar photosphere photography, passing the Ha (656.3nm), CaK (393.3nm), and CaH (396.8nm) wavelengths. It comes with an Antlia Energy Rejection Filter (ERF) that blocks UV and IR light, and the necessary ND filter is factory-installed in the tube. Without extra light reduction it can only be used with refractors up to 100mm aperture. Antlia's transmittance requirement for the visible range (380-780nm) is a maximum of 0.0032%. The assembly enhances contrast and sharpness in solar images, with greater visibility of surface details and sunspots and higher contrast for solar faculae.

    Dualband Imaging: Capturing the Photosphere in 656.3nm Ha, 393.3nm CaK, and 396.8nm CaH

    This filter assembly passes Ha 656.3nm, CaK 393.3nm and CaH 396.8nm and is designed for photosphere imaging, such as sunspots. It enhances contrast and sharpness, giving greater visibility of surface details and sunspots and higher contrast for solar faculae.

    Use with Refractors up to 100mm Aperture

    The assembly comes with an Antlia Energy Rejection Filter (ERF) that blocks UV and IR light, and the necessary ND filter is factory-installed in the tube. Without extra light reduction, the assembly can only be used with refractors up to 100mm aperture. With a telescope above 100mm aperture, Antlia requires additional light reduction for safe operation, such as ERF filters, solar safety films or lowering the telescope aperture. When you use a zenith mirror, the ERF filter must be installed in the correct position for safe operation; refer to Antlia's installation diagram.

    CNC-Machined Body with 1.25" and 2" Compatibility

    The filters are assembled in a fully closed tube, CNC machined from aircraft aluminum and oxidized, and no stray light can escape from it. It installs like the Antlia CaK 3nm Solar Herschel Wedge, with the telescope at one end and the camera at the other. This Standard version is compatible with both 1.25" and 2" adapters, for easier and faster connection of telescopes and cameras.

    Solar Discover Assembly vs. Traditional Solar Film: A Contrast and Resolution Advantage

    Compared to other solar reducing films, the Solar Discover Dualband assembly enables higher contrast for solar imaging and higher resolution of the solar surface, and its design is less susceptible to wear and tear. It is also user-friendly.

  • Is the Antlia Solar Discover assembly safe for visual solar observing?

    No, Antlia does not recommend this product for visual observation. The IR coating range is slightly different from the ISO 12312-2 Standard for Solar Viewers, and for technical requirements and safety considerations Antlia does not recommend it for visual use. Antlia adds that if the product is used for visual observation, all filters built into the assembly must be in good condition for safety. It is designed for solar photosphere photography.

    Can I use the Antlia Solar Discover on a telescope larger than 100mm aperture?

    Only with additional light reduction. Without it, the assembly can only be used with refractors up to 100mm aperture. Above 100mm aperture, you must use additional light reduction for safe operation, such as ERF filters, solar safety films or lowering the telescope aperture.

    What details can I capture with the Antlia Solar Discover's Ha, CaK, and CaH passbands?

    These three wavelengths reveal different solar features, enhancing your images:

    • Photosphere: The assembly is designed for solar photosphere imaging, such as sunspots, with greater visibility of surface details.
    • Faculae: The assembly gives higher contrast for solar faculae.

    How does the Antlia Solar Discover compare to a white-light solar film filter?

    Compared to other solar reducing films, the Solar Discover Dualband assembly enables higher contrast for solar imaging and higher resolution of the solar surface, and its design is less susceptible to wear and tear.

    How do I install the Antlia Solar Discover with a zenith mirror?

    When you use a zenith mirror, the included Antlia Energy Rejection Filter (ERF) must be installed in the correct position for safe operation, as shown in Antlia's installation diagram. The assembly itself installs with the telescope at one end and the camera at the other. Contact us if you have any question about the installation.

    What happens if I disassemble the Antlia Solar Discover filter assembly?

    Disassembly of the assembly is prohibited and voids the 3-year warranty. Antlia does not accept any repair, return or exchange for this item once it has been disassembled.

  • Product Type Solar photosphere imaging filter assembly
    Wavelengths Passed Ha (656.3nm), CaK (393.3nm), CaH (396.8nm)
    Version Standard
    Telescope Aperture Without extra light reduction, refractors up to 100mm only; above 100mm use additional light reduction
    Adapters Compatible with 1.25" and 2"
    Energy Rejection Filter (ERF) Included, blocks UV and IR
    ND Filter Factory-installed in the tube
    Tube Construction Fully closed, CNC machined aircraft aluminum, oxidized
    Visible Light Transmittance (380-780nm) Tmax 0.0032%, Tmin 0.000061%
    UVB Transmittance (280-315nm) Tmax 0.0032%
    UVA Transmittance (315-380nm) Tmax 0.0032%
    IR Transmittance (780-1700nm) Tmax 3%
    Visual Use Not Recommended
    Installation Telescope at one end, camera at the other; with a zenith mirror, the ERF must be in the correct position
    Warranty 3-years (void if disassembled)

    • Solar Discover Dualband filter assembly

      × 1

    • Antlia Energy Rejection Filter (ERF)

      × 1

    • ND filter (factory-installed)

      × 1

  • 3-Year Manufacturer Warranty. Disassembly of the assembly is prohibited and voids the warranty.