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  1. IDAS - Hutech - 48mm (for 2") UV/IR Blocking Filter

    IDAS - Hutech - 48mm (for 2") UV/IR Blocking Filter

    "A chain is only as good as its weakest link." This well-known truth applies to many "chains", including the optical chain, which includes a telescope, eyepiece, and filter.

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    Model#: UIBAR-48
    $179.00

  2. Astrodon - Narrowband - 36mm Unmounted OIII 3 nm Filter

    Astrodon - Narrowband - 36mm Unmounted OIII 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

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    FREE SHIPPING
    (48 States)
    Model#: OIII3-36R
    $650.00

  3. Astrodon - Narrowband - 36mm Unmounted SII 3 nm Filter

    Astrodon - Narrowband - 36mm Unmounted SII 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

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    (48 States)
    Model#: SII3-36R
    $650.00

  4. Astrodon - Narrowband - 36mm Unmounted H-Alpha 3 nm Filter

    Astrodon - Narrowband - 36mm Unmounted H-Alpha 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

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    FREE SHIPPING
    (48 States)
    Model#: HA3-36R
    $650.00

  5. Opticstar - 1.25" High Transparency Imaging Filters

    Opticstar - 1.25" High Transparency Imaging Filters

    These high transparency filters from Opticstar are placed within a thin metal ring with a full 26mm clear aperture that threads into the barrel of any standard 1.25" eyepiece or filter wheel that can accept 1.25" filters.

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    Model#: OSRHRGBI

    Regular Price: $150.00

    Special Price: $142.50

  6. Opticstar - 1.25" Infra-Red Cut-Off Imaging Filter

    Opticstar - 1.25" Infra-Red Cut-Off Imaging Filter

    For the use in CCD imaging this high-transmission filter will exclude any IR wavelengths beyond H-alpha showing a very steep desirable curve.

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    Model#: OSRIFIR

    Regular Price: $45.00

    Special Price: $42.75

  7. Opticstar - 2" Nebula Deep Sky Filter

    Opticstar - 2" Nebula Deep Sky Filter

    This Opticstar 2" eyepiece is suitable for both visual observation and imaging these are all-in-one high-transmission deep sky filters.

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    Model#: OSRIFNEB2

    Regular Price: $105.00

    Special Price: $99.75

  8. Orion - 2" Extra Narrowband Filter Set

    Orion - 2" Extra Narrowband Filter Set

    These specialized astrophotography filters pass select wavelengths and essentially block all other wavelengths of light, including light pollution, so you can capture images in less than ideal conditions.

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    Model#: 25545
    $969.95

  9. Orion - 2" Extra-Narrowband Hydrogen Alpha Filter

    Orion - 2" Extra-Narrowband Hydrogen Alpha Filter

    Filter for astrophotography transmits 90% of light at 656.3nm wavelength (H-alpha).

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    Model#: 05547
    $359.95

  10. Orion - 2" Extra-Narrowband Sulfur-II Filter

    Orion - 2" Extra-Narrowband Sulfur-II Filter

    Effectively blacken the background sky with extra-narrowband filters to produce striking, high-contrast astrophotography of emission nebulae. Orion's 2" Extra-Narrowband Sulfur-II Imaging Filter will do just that. It is ideal for use with monochrome CCD cameras like Orion's Parsec 8300M.

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    Model#: 05546
    $359.95

  11. Orion - 2" Extra-Narrowband Oxygen III Filter

    Orion - 2" Extra-Narrowband Oxygen III Filter

    If you're using a monochrome CCD camera like Orion's Parsec 8300M, these specialized "line" filters are the perfect complement. Orion's 2" Oxygen-III Filter has a full-width half maximum (FWHM) bandpass of just 7nm, ensuring high-contrast images, even in heavily light-polluted or brightly moonlit skies. The filter can be used separately or in combination with a filter wheel for advanced tri-color imaging of emission nebulae.

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    Model#: 05545
    $359.95

  12. SBIG - FW5-STX Filter Wheel

    SBIG - FW5-STX Filter Wheel

    Filter wheel for STX series cameras, 5-position 65mm square filters.

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    FREE SHIPPING
    (48 States)
    Model#: FW5-STX
    $1,795.00

  13. Astrodon - 50mm" Gen 2 Parfocal UV Blocked Clear Square Filter

    Astrodon - 50mm" Gen 2 Parfocal UV Blocked Clear Square Filter

    Astrodon's new improvements of photometric Sloan filters generation 2 feature excellent out of band clocking and other edge-blackended compounds to reduce stray light reflections to assist in CCD imaging.

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    FREE SHIPPING
    (48 States)
    Model#: C2_50S_Gen2
    $295.00

  14. Astrodon - 50mm" Gen 2 Parfocal UV Blocked Clear Filter

    Astrodon - 50mm" Gen 2 Parfocal UV Blocked Clear Filter

    Astrodon's new improvements of photometric Sloan filters generation 2 feature excellent out of band clocking and other edge-blackended compounds to reduce stray light reflections to assist in CCD imaging.

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    (48 States)
    Model#: C2_50R_Gen2
    $250.00

  15. FLI - 7 position CFW (for 65mm square filters)

    FLI - 7 position CFW (for 65mm square filters)

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    FREE SHIPPING
    (48 States)
    Model#: CFW-10-7
    $2,795.00

  16. IDAS - Hutech - LRGB set (31mm unmounted) for QSI 500 series

    IDAS - Hutech - LRGB set (31mm unmounted) for QSI 500 series

    Hutech LRGB filter set for QSI 500 series cameras.

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    FREE SHIPPING
    (48 States)
    Model#: RS-31
    $575.00

  17. IDAS Hutech 28.6mm (for 1.25") UB/IR Blocking Filter
  18. IDAS - Hutech - AP Filter Holder with 72mm LPS Filter

    IDAS - Hutech - AP Filter Holder with 72mm LPS Filter

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    FREE SHIPPING
    (48 States)
    Model#: LPS-P2-72AP
    $365.00

  19. IDAS - Hutech - SCT Filter adapter with 48mm LPS Filter

    IDAS - Hutech - SCT Filter adapter with 48mm LPS Filter

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    FREE SHIPPING
    (48 States)
    Model#: LPS-P2-48SCT
    $265.00

  20. IDAS - Hutech - 82mm LPS Filter

    IDAS - Hutech - 82mm LPS Filter

    Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.

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    FREE SHIPPING
    (48 States)
    Model#: LPS-P2-82
    $369.00

Items 1 to 20 of 972 total

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