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  1. Astronomik - H-Beta Filter - 1.25" Round Mounted

    Astronomik - H-Beta Filter - 1.25" Round Mounted

    The Astronomik H-beta is a filter for visual observation, in particular with instruments of larger aperture.

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    Model#: HB-1
    $119.95

  2. Astronomik - H-Beta Filter - 2" Round Mounted

    Astronomik - H-Beta Filter - 2" Round Mounted

    The Astronomik H-beta is a filter for visual observation, in particular with instruments of larger aperture.

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    (48 States)
    Model#: HB-2
    $239.95

  3. Astronomik - OIII Filter - 1.25" Round Mounted

    Astronomik - OIII Filter - 1.25" Round Mounted

    From the start, the Astronomik OIII filter has been very specifically designed for the visual observation of gaseous and planetary nebulae.

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    Model#: OIII-1
    $119.95

  4. Astronomik - OIII Filter - 2" Round Mounted

    Astronomik - OIII Filter - 2" Round Mounted

    From the start, the Astronomik OIII filter has been very specifically designed for the visual observation of gaseous and planetary nebulae.

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    (48 States)
    Model#: OIII-2
    $239.95

  5. Astronomik - OIII Filter - SCT Rear Cell

    Astronomik - OIII Filter - SCT Rear Cell

    From the start, the Astronomik OIII filter has been very specifically designed for the visual observation of gaseous and planetary nebulae.

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    (48 States)
    Model#: OIII-SCT
    $239.95

  6. Astronomik - UHC Filter - SCT Rear Cell

    Astronomik - UHC Filter - SCT Rear Cell

    The Astronomik UHC filter is for visual deep-sky observation.

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    (48 States)
    Model#: UHC-SCT
    $239.95

  7. Astronomik - UHC Visual Filter - 1.25" Round Mounted

    Astronomik - UHC Visual Filter - 1.25" Round Mounted

    The Astronomik UHC filter is for visual deep-sky observation.

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    Model#: UHC-1
    $119.95

  8. Astronomik - UHC-E - Economy UHC Filter - 2" Round Mounted

    Astronomik - UHC-E - Economy UHC Filter - 2" Round Mounted

    This 2" UHC filter is made with less expensive glass than Astronomik's high-end UHC filter, but is of higher quality than other economy UHC filters on the market.

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    Model#: UHCE-2
    $149.95

  9. FCB-2

    Baader Planetarium - Contrast Booster 2" Filter

    Much more than a simple minus-violet filter. Based on the popular Baader Moon&Skyglow filter, the Baader Contrast-Booster takes contrast enhancement and skyglow reduction to the maximum level possible from a filter

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    Model#: FCB-2
    $117.00

  10. Celestron - Contrast Booster Filter - 1.25"

    Celestron - Contrast Booster Filter - 1.25"

    This is our newest high quality filter that eliminates most color aberration inherent in achromatic refractor telescopes. The filter also reduces your view of the blue hue around lunar and planetary subjects. Features multi-layer coatings for 95% transmission.

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    Model#: 94121
    $57.00

  11. Celestron - Eyepiece Filter Set 1 - 1.25" (#21, 80A, 15, Polarizing)

    Celestron - Eyepiece Filter Set 1 - 1.25" (#21, 80A, 15, Polarizing)

    Kit includes: 21, 80A, #15, Polarizing filters

    Celestron color filters are mounted in black anodized aluminum cells with the Kodak Wratten Series Number individually engraved, and come available in 4 assorted kits packed in plastic cases. The cells of each filter are double-threaded, so they can be stacked (piggybacked) in various combinations.

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    Model#: 94119-10
    $34.50

  12. Celestron - Eyepiece Filter Set 4 - 1-1.25" (#8,15,47,82A)

    Celestron - Eyepiece Filter Set 4 - 1-1.25" (#8,15,47,82A)

    Kit includes: #8, #47, #82A, ND-13 filtersCelestron color filters are mounted in black anodized aluminum cells with the Kodak Wratten Series Number individually engraved, and come available in 4 assorted kits packed in plastic cases.

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    Model#: 94119-40

    Regular Price: $49.95

    Special Price: $31.95

  13. Celestron - LPR Filter (Model B - for back threads of SCTs)

    Celestron - LPR Filter (Model B - for back threads of SCTs)

    Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light. This includes mercury, and both high and low pressure sodium vapor lights. In addition, they block unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow). As a result, Celestron LPR Filters darken the background sky, making deep-sky observation and photography of nebulae, star clusters and galaxies possible from urban areas. LPR Filters are not used for lunar, planetary or terrestrial photography.

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    Model#: 94127A
    $89.00

  14. Celestron - Moon Filter  - 1.25"

    Celestron - Moon Filter - 1.25"

    Celestron's Moon Filter is an economical eyepiece filter for reducing the brightness of the moon and improving contrast, so greater detail can be observed on the lunar surface. The clear aperture is 21mm and the transmission is about 18%.

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    Model#: 94119-A
    $10.95

  15. Celestron Oxygen III (OIII) Narrowband Filter - 1.25"

    Celestron - Oxygen III (OIII) Narrowband Filter - 1.25"

    The 1-1/4" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light.

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    Model#: 93623
    $69.50

  16. Celestron Oxygen III (OIII) Narrowband Filter 2"

    Celestron - Oxygen III (OIII) Narrowband Filter - 2"

    Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.

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    Model#: 93624
    $99.50

  17. Celestron - UHC/LPR Filter - 1.25"

    Celestron - UHC/LPR Filter - 1.25"

    The new ultra high contrast (UHC) LPR filter has improved contrast over the typical broadband filters. Sky background is darker, and contrast of emission nebulae are noticeably improved.

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    Model#: 94123
    $64.50

  18. Celestron - UHC/LPR Filter - 2"

    Celestron - UHC/LPR Filter - 2"

    The new ultra high contrast (UHC) LPR filter has improved contrast over the typical broadband filters. Sky background is darker, and contrast of emission nebulae are noticeably improved.

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    Model#: 94124
    $89.50

  19. DGM Optics - 1.25" CGE Filter

    DGM Optics - 1.25" CGE Filter

    The GCE takes a different approach to Wideband LPR filters by employing a "Notch" design which excludes all the bad stuff, from 540 - 590 nm, while allowing the rest of the visible spectrum to transmit over 90%.

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    Model#: CGE 1.25
    $80.00

  20. DGM Optics - 1.25" HPOIII Filter

    DGM Optics - 1.25" HPOIII Filter

    The DGM Optics HPOIII is your perfect compliment to the NPB when you need a more aggressive Nebula filter that really shines with larger scopes. This filter has a bandwidth of approx.

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    Model#: HPOIII 1.25
    $85.00

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