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  1. Chroma Technology - Green 31mm Diameter Filter - Unmounted

    Chroma Technology - Green 31mm Diameter Filter - Unmounted

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    Model#: Green-31
    $130.00

  2. Chroma Technology - Red 31mm Diameter Filter - Unmounted

    Chroma Technology - Red 31mm Diameter Filter - Unmounted

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    Model#: Red-31
    $130.00

  3. Chroma Technology - Green 50mm x 50mm Diameter Filter - Square

    Chroma Technology - Green 50mm x 50mm Diameter Filter - Square

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    FREE SHIPPING
    (48 States)
    Model#: Green-50S
    $285.00

  4. Astronomik - Dark Filter - 2"

    Astronomik - Dark Filter - 2"

    Do you have a CCD camera without a mechanical shutter and would like to do dark frames without continually monitoring your equipment?

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    Model#: DARK-2
    $49.95

  5. 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

  6. Baader Planetarium - 2" LRGB Filters - UV/IR Cut L-Filter

    Baader Planetarium - 2" LRGB Filters - UV/IR Cut L-Filter

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    FREE SHIPPING
    (48 States)
    Model#: FLRGB-2
    $619.00

  7. Baader Planetarium - 2" LRGBC Filters - UV/IR Cut L-Filter and Clear Filter

    Baader Planetarium - 2" LRGBC Filters - UV/IR Cut L-Filter and Clear Filter

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    FREE SHIPPING
    (48 States)
    Model#: FLRGBC-2
    $679.00

  8. Baader Planetarium - 36mm Round LRGB Filters - UV/IR Cut L-Filter

    Baader Planetarium - 36mm Round LRGB Filters - UV/IR Cut L-Filter

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    FREE SHIPPING
    (48 States)
    Model#: FLRGB-RD36
    $477.00

  9. Baader Planetarium - 50.8mm Round LRGB Filters - UV/IR Cut L-Filter

    Baader Planetarium - 50.8mm Round LRGB Filters - UV/IR Cut L-Filter

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    (48 States)
    Model#: FLRGB-RD50
    $690.00

  10. Baader Planetarium - 50.8mm Round LRGBC Filters - UV/IR Cut L-Filter and Clear Filter

    Baader Planetarium - 50.8mm Round LRGBC Filters - UV/IR Cut L-Filter and Clear Filter

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    FREE SHIPPING
    (48 States)
    Model#: FLRGBC-RD50
    $749.00

  11. Baader Planetarium - 50mm Square LRGB Filters - UV/IR Cut L-Filter

    Baader Planetarium - 50mm Square LRGB Filters - UV/IR Cut L-Filter

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    (48 States)
    Model#: FLRGB-SQ50
    $789.00

  12. Baader Planetarium - 50mm Square LRGB Filters - UV/IR Cut L-Filter and Clear Filter

    Baader Planetarium - 50mm Square LRGB Filters - UV/IR Cut L-Filter and Clear Filter

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    FREE SHIPPING
    (48 States)
    Model#: FLRGBC-SQ50
    $849.00

  13. Baader Planetarium - 65mm  Square LRGB Filters - UV/IR Cut L-Filter

    Baader Planetarium - 65mm Square LRGB Filters - UV/IR Cut L-Filter

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    (48 States)
    Model#: FLRGB-SQ65
    $949.00

  14. Baader Planetarium - 1.25" LRGBC Filters UV/IR Cut L-Filter and Clear Filter

    Baader Planetarium - 1.25" LRGBC Filters - UV/IR Cut L-Filter and Clear Filter

    Baader 1.25" RGB Filter Set with UV/IR Cut L-Filter and Clear Focusing Filter (Optically Polished) - Set of 5 filters.

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    FREE SHIPPING
    (48 States)
    Model#: FLRGBC-1
    $427.00

  15. Baader Planetarium - 1.25" LRGB Filters - UV/IR Cut L-Filter

    Baader Planetarium - 1.25" LRGB Filters - UV/IR Cut L-Filter

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    (48 States)
    Model#: FLRGB-1
    $379.00

  16. FLI - 28mm Research Grade Filters - LRGB and UBVRI

    FLI - 28mm Research Grade Filters - LRGB and UBVRI

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    Model#: RG 28D Filters

    Starting at: $140.00

  17. 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

  18. 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

  19. 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

  20. 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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    FREE SHIPPING
    (48 States)
    Model#: SII3-36R
    $650.00

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