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  1. Astronomik - Planet IR Pro 807 Filter - 31mm Round Unmounted

    Astronomik - Planet IR Pro 807 Filter - 31mm Round Unmounted

    The Astronomik ProPlanet 807 filter is a deal addition to the Astronomik ProPlanet 742 for imaging the moon and planets, with telescopes larger then 10" (250mm) when the seeing is poor.

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    Model#: P807-31
    $59.95

  2. Levenhuk - 2" Ra UHC Filter

    Levenhuk - 2" Ra UHC Filter

    Levenhuk Ra UHC 2'' filter is a great accessory for deep-sky observations under urban illumination conditions. This filter has a 0.92 transmittance

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    Model#: 35437
    $98.95

  3. Astrodon Photometric UVBRIc 50mm Unmounted Rc Edge Blackened Filter

    Astrodon - Photometric UVBRIc - 50mm Unmounted Rc Edge Blackened Filter

    Astrodon Photometrics - UVBRI filters have been the standard for photometric measurements for decades.

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    FREE SHIPPING
    (48 States)
    Model#: Rc*-50R
    $400.00

  4. Farpoint - Romor 48mm UV Filter

    Farpoint - Romor 48mm UV Filter

    Romor 48mm threaded UV filter. Threads fit 2" eyepiece end forming a dust cap. ... Learn More
    Model#: FP502
    $6.80

  5. Lumicon - 1.25" Lunar & Planetary Filter Set (Light)

    Lumicon - 1.25" Lunar & Planetary Filter Set (Light)

    The Lumicon 1.25" Lunar & Planetary Filter Set (Light) contains the following filters: #8 Light Yellow, #11 Yellow-Green #21 Orange, #82A Light Blue

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    Model#: LF5080
    $83.95

  6. Lumicon - 1.25" Lunar & Planetary Filter Set (Dark)

    Lumicon - 1.25" Lunar & Planetary Filter Set (Dark)

    The Lumicon 1.25" Lunar & Planetary Filter Set (Light) contains the following filters: #12 Yellow, #25 Red, #47 Violet, #58 Green

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    Model#: LF5085
    $83.95

  7. Opticstar 1.25" CRGbB Filter Set

    Opticstar - 1.25" CRGbB Filter Set

    These filters are positioned 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#: OSRCRGB

    Regular Price: $90.00

    Special Price: $85.50

  8. Chroma filters

    Chroma Technology - Blue 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#: Blue-31
    $130.00

  9. 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

  10. Levenhuk - 1.25" Ra UHC Filter

    Levenhuk - 1.25" Ra UHC Filter

    This filter was designed for observations of dim and low-contrast deep-sky objects. The passband includes the Hβ wavelength (4861 Å) and the OIII doublet (4959 Å and 5007 Å).

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    Model#: 45128
    $68.95

  11. Levenhuk - 2" Ra O-III Filter

    Levenhuk - 2" Ra O-III Filter

    Levenhuk Ra O-III 2'' filter is a narrow-passband filter with a barrel diameter of 2'' that transmits wavelengths of the visible spectrum within 150 Å (15 nm) range.

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    Model#: 35436
    $94.95

  12. Astronomik - Planet IR Pro 807 Filter - 36mm Round Unmounted

    Astronomik - Planet IR Pro 807 Filter - 36mm Round Unmounted

    The Astronomik ProPlanet 807 filter is a deal addition to the Astronomik ProPlanet 742 for imaging the moon and planets, with telescopes larger then 10" (250mm) when the seeing is poor.

    ...
    Learn More
    Model#: P807-36
    $69.95

  13. Astronomik - SII 12nm CCD Filter - 31mm Round Unmounted

    Astronomik - SII 12nm CCD Filter - 31mm Round Unmounted

    The Astronomik SII-CCD filter is a narrow-band-filter for CCD photography.

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    Model#: SII-31
    $179.95

  14. Astronomik - SII 12nm CCD Filter - 36mm Round Unmounted

    Astronomik - SII 12nm CCD Filter - 36mm Round Unmounted

    The Astronomik SII-CCD filter is a narrow-band-filter for CCD photography.

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    FREE SHIPPING
    (48 States)
    Model#: SII-36
    $229.95

  15. Levenhuk - 1.25" Ra CLS' Filter

    Levenhuk - 1.25" Ra CLS' Filter

    Levenhuk Ra CLS 1.25'' filter is capable of enhancing the contrast of observed nebulae and other deep-sky objects, which will be very useful for those who often stargaze in the city.

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    Model#: 45130
    $59.95

  16. Levenhuk - 2" Ra CLS Filter

    Levenhuk - 2" Ra CLS Filter

    Levenhuk Ra CLS 2'' filter is capable of enhancing the contrast of observed nebulae and other deep-sky objects, which will be very useful for those who often stargaze in the city.

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    Model#: 35439
    $84.95

  17. Levenhuk - 1.25" Ra H-Beta Filter

    Levenhuk - 1.25" Ra H-Beta Filter

    Levenhuk Ra H-Beta 1.25'' filter may be used for deep-sky observations of emission nebulae and other marvels. Apart from enhancing the contrast of observed objects, this filter suppresses up to 90% of light.

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    Model#: 45129
    $97.95

  18. Levenhuk - 2" Ra H-Beta Filter

    Levenhuk - 2" Ra H-Beta Filter

    Levenhuk Ra H-Beta 2'' filter is used for observations of deep-sky objects, such as emission nebulae (H II) and others.

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    Model#: 35438
    $119.95

  19. Levenhuk - 1.25" Ra O-III Filter

    Levenhuk - 1.25" Ra O-III Filter

    Levenhuk Ra O-III 1.25'' filter is a narrow-passband filter with a barrel diameter of 1.25'' that transmits wavelengths of the visible spectrum within 150 Å (15 nm) range.

    ...
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    Model#: 45127
    $74.95

  20. 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

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