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  1. Optolong - CLS Filter - 2" Mounted

    Optolong - CLS Filter - 2" Mounted

    The Optolong CLS channel is ideal for both visual and photographic applications in light polluted locations. The City Light Suppression Filter's pass-band is more extensive than the famous UHC, or Ultra High Contrast channel, numerous astronomer experts favor its utilization when observing in mild to moderate light pollution.

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    Model#: CLS-200
    $85.00

  2. Stellarvue Color Balanced Chromatic Aberration Filter

    Stellarvue - Color Balanced Chromatic Aberration Filter - 1.25"

    The Stellarvue 1.25" XLCR filter is a color correcting filter which will help reduce the violet fringing on the edges of bright objects, like the Moon and bright planets, while observing with a Achromatic or ED refractor. ... Learn More
    Model#: XCLR1
    $79.00

  3. Baader Planetarium 1.25" Polarization Filter - Single

    Baader Planetarium - 1.25" Polarization Filter - Single

    The Baader Planetarium 1.25" Polarization filter can be threaded directly into an eyepiece, thereby making the switch from 1.25" eyepieces easy without removing the filter and maintaining a close distance between the eyepiece and filter.

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    Model#: FPOL-1
    $54.00

  4. 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#: CEL-94123
    $74.95

  5. 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#: CEL-94124
    $99.95

  6. FP473

    Opticstar - 1.25 " Nebula Deep Sky Filter

    This Opticstar 1.25" eyepiece is suitable for both visual observation and imaging these are all-in-one high-transmission deep sky filters.

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    Model#: OSRIFNEB1
    $57.00

  7. Lumicon - Night Sky H-Alpha Filter  1.25"

    Lumicon - Night Sky H-Alpha Filter 1.25"

    Lumicon's Night Sky Hydrogen-Alpha Filters are long-pass filters with a 50% transition from blocking to passing at about 640nm.

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    Model#: LF3085

    Regular Price: $135.00

    Special Price: $95.95

  8. Lumicon - Night Sky H-Alpha Filter  2"

    Lumicon - Night Sky H-Alpha Filter 2"

    Lumicon's Night Sky Hydrogen-Alpha Filters are long-pass filters with a 50% transition from blocking to passing at about 640nm. At wavelengths longer than 650nm, transmittance is 90% or above

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    Model#: LF3090

    Regular Price: $168.00

    Special Price: $119.95

  9. Lumicon - Minus Violet Filter 1.25"

    Lumicon - Minus Violet Filter 1.25"

    Lumicon Minus Violet and Infrared Blocking Filters are used primarily to "bracket" the color-corrected band of refracting telescopes.

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    Model#: LF3120

    Regular Price: $102.00

    Special Price: $71.95

  10. Lumicon - Minus Violet Filter 2"

    Lumicon - Minus Violet Filter 2"

    Lumicon Minus Violet and Infrared Blocking Filters are used primarily to "bracket" the color-corrected band of refracting telescopes

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    Model#: LF3125

    Regular Price: $134.00

    Special Price: $95.95

  11. Lumicon - Multiple Filter Selector 1.25"

    Lumicon - Multiple Filter Selector 1.25"

    LUMICON Multiple Filter Selectors allow you to easily switch filters without having to thread and unthread them from your eyepiece or diagonal.

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    Model#: LF5012
    $142.95

  12. Lumicon - 1.25" Lunar & Planetary Filter Set (4)

    Lumicon - 1.25" Lunar & Planetary Filter Set (4)

    The Lumicon 1.25" Lunar & Planetary Filter Set, LF5045, is an excellent "starter-kit,"

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    Model#: LF5045

    Regular Price: $127.00

    Special Price: $83.95

  13. Lumicon - Filter # 21 Orange 1.25"

    Lumicon - Filter # 21 Orange 1.25"

    Each filter is individually precision ground and highly polished with ultra-high light transmittance coatings on both sides for ultimate contrast on lunar and planetary detail. Double stacking filters may also improve lunar imaging ... Learn More
    Model#: LF1030
    $23.95

  14. Lumicon - Filter # 23A Light Red 1.25"

    Lumicon - Filter # 23A Light Red 1.25"

    Each filter is individually precision ground and highly polished with ultra-high light transmittance coatings on both sides for ultimate contrast on lunar and planetary detail. Double stacking filters may also improve lunar imaging ... Learn More
    Model#: LF1035
    $23.95

  15. Lumicon - Filter # 25 Red 1.25"

    Lumicon - Filter # 25 Red 1.25"

    Each filter is individually precision ground and highly polished with ultra-high light transmittance coatings on both sides for ultimate contrast on lunar and planetary detail. Double stacking filters may also improve lunar imaging ... Learn More
    Model#: LF1040
    $23.95

  16. Lumicon - Filter # 29 Dark Red 1.25"

    Lumicon - Filter # 29 Dark Red 1.25"

    Each filter is individually precision ground and highly polished with ultra-high light transmittance coatings on both sides for ultimate contrast on lunar and planetary detail. Double stacking filters may also improve lunar imaging ... Learn More
    Model#: LF1045
    $23.95

  17. 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#: CEL-93624
    $109.95

  18. 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#: CEL-93623
    $79.95

  19. 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#: CEL-94119-40

    Regular Price: $49.95

    Special Price: $31.95

  20. Astronomik - H-ßeta Filter - 1.25" Round Mounted

    Astronomik - H-ßeta 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
    $99.95

Items 61 to 80 of 124 total

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