Energy Rejection Filters

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  1. Energy Rejection Filter - glass, cell and cap - Specify dimensions
    Energy Rejection Filter - glass, cell and cap - Specify dimensions
    $0.00

    Energy Rejection Filter for Hydrogen Alpha solar filter. Specify dimensions below. Learn More
  2. Off axis ERF for 14" SCT (115mm)
    Off axis ERF for 14" SCT (115mm)
    $1,195.00

    115mm clear aperture, 410mm inside diameter of the cap. Learn More
  3. Off axis ERF for 12" SCT (100mm)
    Off axis ERF for 12" SCT (100mm)
    $895.00

    Out of stock

    CURRENTLY OUT-OF-STOCK UNTIL AFTER ECLIPSE OF OCTOBER 2023 100mm clear aperture, 356mm inside diameter of the cap. Learn More
  4. Off axis ERF for 11" SCT (90mm)
    Off axis ERF for 11" SCT (90mm)
    $695.00

    90mm clear aperture, 325mm inside diameter of the cap. Learn More
  5. Off axis ERF for 10" SCT (80mm)
    Off axis ERF for 10" SCT (80mm)
    $550.00

    In Stock!

    80mm clear aperture, 311mm inside diameter of the cap. Learn More
  6. Off axis ERF for 8" SCT (63mm)
    Off axis ERF for 8" SCT (63mm)
    $550.00

    63mm clear aperture, 244mm inside diameter of the cap. Learn More
  7. Off axis ERF for 9.25" SCT (80mm)
    Off axis ERF for 9.25" SCT (80mm)
    $550.00

    80mm off axis ERF with a cap inside diameter of 281mm. For use on Celestron-9.25s Learn More
  8. 2" UV/IR Filter
    2" UV/IR Filter
    $125.00

    It blocks the heat from reaching your filter and diagonal. Learn More
  9. 1.25" UV/IR Cut Filter
    1.25" UV/IR Cut Filter
    $65.00

    The UV-IR Blocker lets the full range of sensitivity of the human eye (according to DIN 5031) pass, and blocks all other parts of the spectrum in the UV and IR. Learn More
  10. Off axis ERF for 16" SCT (125mm)
    Off axis ERF for 16" SCT (125mm)
    $1,195.00

    In Stock!

    125mm clear aperture, 460mm inside diameter of the cap. Learn More

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