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  1. TO - LP-2  Narrowband (Blue Cell)  1.25"

    TO - LP-2 Narrowband (Blue Cell) 1.25"

    Thousand Oaks Optical LP-2 Narrowband (Blue Cell) 1.25" FilterEnhance your deep sky viewing with the latest in multi-layer coating technology. Thousand Oaks filters transmit desired wave-lengths in a very steep slope rather than ... Learn More
    Model#: LP2-1.25
    $89.00

  2. 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

  3. 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

  4. 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

  5. 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

  6. Levenhuk - 1.25" Optical Filter #12 (Yellow)

    Levenhuk - 1.25" Optical Filter #12 (Yellow)

    Levenhuk 1.25" Optical Filter #12 (Yellow) has a barrel diameter of 1.25" and transmits up to 74% of visible light. With this filter, you can study celestial objects—such as ... Learn More
    Model#: 28090
    $19.95

  7. Levenhuk - 1.25" Optical Filter #58 (Green)

    Levenhuk - 1.25" Optical Filter #58 (Green)

    Levenhuk 1.25" Optical Filter #58 (Green) has a barrel diameter of 1.25" and transmits up to 24% of visible light. With this filter, you can study the minutest details of celestial objects—such as ... Learn More
    Model#: 28087
    $19.95

  8. Levenhuk - 1.25" Optical Filter #25 (Red)

    Levenhuk - 1.25" Optical Filter #25 (Red)

    Levenhuk 1.25" Optical Filter #25 (Red) has a barrel diameter of 1.25" and transmits up to 14% of visible light. With this filter, you can study the minutest details of celestial objects—such as ... Learn More
    Model#: 28088
    $19.95

  9. Levenhuk - 1.25" Optical Filter #21 (Orange)

    Levenhuk - 1.25" Optical Filter #21 (Orange)

    Levenhuk 1.25" Optical Filter #21 (Orange) has a barrel diameter of 1.25" and transmits up to 56% of visible light. With this filter, you can study the minutest details of celestial objects—such as ... Learn More
    Model#: 28089
    $19.95

  10. Levenhuk - 1.25" Optical Filter #56 (Light Green)

    Levenhuk - 1.25" Optical Filter #56 (Light Green)

    Levenhuk optical filter #56 (light green) has a barrel diameter of 1.25" and transmits up to 53% of visible light. With this filter, you can study the minutest details of celestial objects—such as ... Learn More
    Model#: 28086
    $19.95

  11. Levenhuk - 1.25" Optical Filter #80A (Blue)

    Levenhuk - 1.25" Optical Filter #80A (Blue)

    Levenhuk 1.25" Optical Filter #80A (Blue) has a barrel diameter of 1.25" and transmits up to 30% of visible light. With this filter, you ... Learn More
    Model#: 28091
    $19.95

  12. Astrodon 1.25" dia. Unmounted R Filter

    Astrodon - Photometric UVBRIc - 1.25" Mounted Rc Edge Blackened Filter

    UVBRI filters have been the standard for photometric measurements for decades.  They have evolved over time as technology changed.  H. Johnson in the 1950s and A.W.J. Cousins in the 1970s designed these filters for photomultiplier tubes (PMT).

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    Model#: Rc*-27R
    $200.00

  13. Baader Planetarium - U Filter (Venus and Ultraviolet) - 1.25"

    Baader Planetarium - U Filter (Venus and Ultraviolet) - 1.25"

    Another unique and pioneering filter from Baader Planetarium. For the first time, amateurs can now record cloud structures on Venus. The Baader Venus Filter enables amateurs to successfully image in the deep UV, a spectral region normally inaccessible

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    FREE SHIPPING
    (48 States)
    Model#: FUV-1
    $296.00

  14. Baader Planetarium Set of 5 Photometric UBVRI Filters 1.25" (4mm Glass Thickness, Optically Polished)
  15. 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

  16. 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

  17. 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

  18. TO LP-3 OIII (Green Cell) 1.25"

    TO - LP-3 OIII (Green Cell) 1.25"

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    Model#: LP3-1.25
    $89.00

  19. TO - LP-4  H-Beta (Red Cell)  1.25"

    TO - LP-4 H-Beta (Red Cell) 1.25"

    Thousand Oaks Optical LP-4 H-Beta (Red Cell) 1.25" FilterEnhance your deep sky viewing with the latest in multi-layer coating technology. Thousand Oaks filters transmit desired wave-lengths in a very steep slope rather than ... Learn More
    Model#: LP4-1.25
    $89.00

  20. Vixen - Moon Filter 1.25"

    Vixen - Moon Filter 1.25"

    While looking at the reflect light off the Moon can not physically harm the observer, the intensity can be very bright. By adding this filter into the optical path, the observer can relax and enjoy the many fascinating features found on our Moon.

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    Model#: 3702
    $35.95

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