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  1. Baader Planetarium - H-Alpha 35nm CCD Filter, 50.4 x 3mm Round

    Baader Planetarium - H-Alpha 35nm CCD Filter, 50.4 x 3mm Round

    Baader's new H-Alpha passfilter enables high-contrast deep sky images of H-II regions (such as the N. American Nebula).

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    (48 States)
    Model#: FHAL-RD50
    $214.00

  2. Custom Scientific - UBVRI 50mm Square Filter Set

    Custom Scientific - UBVRI 50mm Square Filter Set

    Custom Scientific UBVRI filters have been used in institutions and observatories around the world such as Kitt Peak, Mauna Kea, and the CTIO/Chile.

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    (48 States)
    Model#: CU-UBVRI50S-SET
    $2,500.00

  3. MallinCam 1.25" IR Cut Filter

    MallinCam - 1.25" IR Cut Filter

    This IR filter is specifically optimized for MallinCam Video CCD Cameras. ... Learn More
    Model#: OA-03
    $89.99

  4. FLI Research Grade 50mm Square Oxygen III - 5nm

    FLI - Research Grade 50mm Square Oxygen III - 5nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes.

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    (48 States)
    Model#: RG-50S-OIII5
    $875.00

  5. FLI Research Grade 50mm Square Sulfur II - 5nm

    FLI - Research Grade 50mm Square Sulfur II - 5nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available.

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    (48 States)
    Model#: RG-50S-SII5
    $875.00

  6. FLI Research Grade 50mm Square Ha 8nm

    FLI - Research Grade 50mm Square Ha - 5nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes.

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    (48 States)
    Model#: RG-50S-HA5
    $875.00

  7. FLI Research Grade 50mm Square Oxygen III - 5nm

    FLI - Research Grade 50mm Square Oxygen III - 3nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes.

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    (48 States)
    Model#: RG-50S-OIII3
    $1,250.00

  8. FLI - Research Grade 50mm Square Sulfur II - 3

    FLI - Research Grade 50mm Square Sulfur II - 3

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50S-SII3
    $1,250.00

  9. FLI Research Grade 50mm Square Ha 3nm

    FLI - Research Grade 50mm Square Ha - 3nm

    FLI's high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes.

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    (48 States)
    Model#: RG-50S-HA3
    $1,250.00

  10. Astro Optic - 2" CLS Filter

    Astro Optic - 2" CLS Filter

    Light pollution CLS Filters are designed to minimize the affects of light pollution by removing common nanometers and wavelengths found in artificial street lights in the city.

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    Model#: Q1-CLS2-01

    Regular Price: $116.99

    Special Price: $89.95

  11. Leica - E49 UVa Infrared Filter

    Leica - E49 UVa Infrared Filter

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    Model#: 13412
    $190.00

  12. 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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    (48 States)
    Model#: Green-50S
    $285.00

  13. Chroma filters

    Chroma Technology - 27mm LRGB Set - Mounted 1.25" Threaded Ring

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

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    (48 States)
    Model#: LRGB-27M
    $475.00

  14. Chroma filters

    Chroma Technology - 31mm LRGB Set - Unmounted

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

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    (48 States)
    Model#: CT-LRGB-31
    $495.00

  15. Chroma filters

    Chroma Technology - 36mm LRGB Set - Unmounted

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

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    (48 States)
    Model#: CT-LRGB-36
    $595.00

  16. Chroma filters

    Chroma Technology - 50mm LRGB Set - Unmounted

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

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    (48 States)
    Model#: CT-LRGB-50
    $875.00

  17. Chroma filters

    Chroma Technology - 50mm x 50mm LRGB Filter Set - Square

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

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    (48 States)
    Model#: LRGB-50S
    $1,085.00

  18. Chroma filters

    Chroma Technology - 65mm x 65mm LRGB Filter Set - Square

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

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    (48 States)
    Model#: LRGB-65S
    $2,595.00

  19. Chroma filters

    Chroma Technology - 27mm LRGB and Ha/8-27 Set - Mounted 1.25" Threaded Ring

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

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    (48 States)
    Model#: HaLRGB-27M
    $725.00

  20. Chroma filters

    Chroma Technology - 31mm LRGB and Ha/8-31 Set - Unmounted

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

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    (48 States)
    Model#: HaLRGB-31
    $755.00

Items 121 to 140 of 348 total

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