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Lunt Front Mount 50mm Double Stack Solar Filter

Special Order
Original price $1,604.00 - Original price $1,604.00
Original price
$1,604.00 - $1,604.00
Current price $1,604.00

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Lunt Front Mount 50mm Double Stack Solar Filter - LS50FHa

Presenting the Lunt LS50FHa Front Mount 50mm Double Stack Solar Filter: The LS50FHa is a 50mm aperture (no central obstruction) integrally tuned etalon expressly engineered for use on Lunt ED Refractors.

Lunt Solar is increasing its range of ED Telescopes, meeting the needs of both daytime and nighttime observations. 

This versatility allows for the utilization of a single telescope for both diurnal and nocturnal observations.

in addition, Lunt Solar provides a complete selection of dedicated Solar Telescopes to meet varying preferences and requirements.

Safety Note: It is crucial to use a matching Lunt Blocking Filter with a Lunt Solar front-mounted Filter as a safety requirement.

Users should select the blocking filter that aligns best with their system requirements.

Notably, a larger blocking filter is recommended for imaging to accommodate the camera's in-focus needs.

  • B600 – Visual Use
  • B1200 – Imaging and Visual Use
  • B1200 – Visual Use
  • B1800 – Imaging and Visual Use

Switching between Day & Night Observation with the LS50FHa Solar Filter

The Lunt ED refractors are designed to be retrofitted with the LS50FHa Hydrogen-alpha Filter, enabling the use of ED telescopes during the day.

Notably, these filters are easily removable, allowing the Lunt ED scope to seamlessly transition for night observing purposes.

With an estimated bandpass of <0.70 Angstrom, the LS50FHa Solar Filter offers high-contrast views of both solar surface and edge details.

Importantly, the addition of an extra etalon system (double-stacking) further refines the bandpass to ~<0.50, facilitating enhanced resolution for viewing and imaging.

The LS50FHa, available by part number, caters to those seeking double-stacking capabilities or those already equipped with a Lunt blocking filter.

To stack two LS50FHa filters for better views, you don't need any extra parts. The right adapter plate will come with the filter, depending on your choice.



  • 50mm Optical Aperture: The Lunt Front Mount 50mm Double Stack Solar Filter boasts a substantial 50mm optical aperture, ensuring a clear and unobstructed view of solar details without a central obstruction. This generous aperture enhances the observational capabilities for solar enthusiasts.
  • Focal Length Compatibility: Specifically designed for ED80 (f/7) and ED102 (f/7) telescopes, the filter complements these instruments, providing an optimized solar observation experience.
  • Double Stack Capability: With its front-mount configuration, this solar filter is equipped for double-stacking on existing Lunt Solar Systems. The double-stacking capability provides an approximate ~<0.5A band pass, significantly refining solar observations for heightened detail and clarity.
  • Compatibility with LS60THA and LS60MT Telescopes: The filter seamlessly accommodates LS60THA and LS60MT Telescopes without the need for additional adapters, streamlining the integration process and enhancing user convenience.
  • Versatile Connection Options: Users have the flexibility to connect the Lunt Front Mount 50mm Double Stack Solar Filter to an appropriately sized refractor of their choice. This adaptability allows for customization of the solar observation setup to suit individual preferences and equipment configurations.
  • Tailored Visual and Imaging Performance: The LS50FHa provides the option to choose the appropriate blocking filter, catering to both visual and imaging requirements. This feature ensures optimal performance and versatility across a range of observational and imaging scenarios.
  • Front-Mounted Non-Obstructed Design: The filter's front-mounted, non-obstructed design contributes to its efficiency, allowing for a seamless integration process and providing users with a clear and unobstructed view of solar phenomena.


    What's Included:

    ✓ Lunt Front Mount 50mm Double Stack Solar Filter

    ✓ Aluminum Hard Case

    ✓ Instructional Manual

    ✓ Lunt 5 Year Warranty



    • Optical Aperture: 50 mm
    • Etalon: <0.70 Angstrom
    • Tuning: Tilt
    • Focal Length: ED80 (f/7) ED102 (f/7)
    • Filter Storage: Aluminum finished hard case with fitted foam
    • Filter Weight: 2 lb. (~1kg)

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