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  1. IDAS Hutech Light Pollution Suppression Filter 52mm

    IDAS - Hutech - Light Pollution Suppression Filter - 52mm

    This light pollution filter suppresses artificial light emission lines while preserving the emission lines from nebulae, therefore enhancing the view and image.

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    Model#: LPS-D1-52
    $189.00

  2. IDAS Hutech Light Pollution Suppression Filter 72mm

    IDAS - Hutech - Light Pollution Suppression Filter - 72mm

    This light pollution filter suppresses artificial light emission lines while preserving the emission lines from nebulae, therefore enhancing the view and image.

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    FREE SHIPPING
    (48 States)
    Model#: LPS-D1-72
    $329.00

  3. IDAS Hutech 31mm Unmounted LPS Filter

    IDAS - Hutech - 31mm Unmounted LPS Filter

    Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.

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    Model#: LPS-P2-31
    $189.00

  4. IDAS - Hutech - 36mm Unmounted LPS Filter

    IDAS - Hutech - 36mm Unmounted LPS Filter

    Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.

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    Model#: LPS-P2-36
    $189.00

  5. IDAS - Hutech - 50mm Unmounted LPS Filter

    IDAS - Hutech - 50mm Unmounted LPS Filter

    Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.

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    Model#: LPS-P2-50
    $189.00

  6. IDAS - Hutech - SCT Filter Adapter  with 48mm LPS-D1 Filter

    IDAS - Hutech - SCT Filter Adapter with 48mm LPS-D1 Filter

    This light pollution filter suppresses artificial light emission lines while preserving the emission lines from nebulae, therefore enhancing the view and image.

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    FREE SHIPPING
    (48 States)
    Model#: LPS-D1-48SCT
    $265.00

  7. Vernonscope 1.25" Polarizer Filter 30%

    Vernonscope - 1.25" Polarizer Filter - 30%

    The Vernonscope 1.25" Mounted Glass Filter is composed of a 1" clear-aperture based optical glass with numbers engraved to match the Kodak Wratten series.

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    Model#: VRN114FILTPL
    $39.00

  8. Vernonscope Ten 1.25" Filter Set

    Vernonscope - Ten 1.25" Filter Set

    This Vernonscope eyepiece set includes ten 1.25" visual filters that are compatible with the Brandon Ocular and Dakin Barlow eyepieces and include numbers on the surface that match Kodak Wratten.

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    FREE SHIPPING
    (48 States)
    Model#: 27200
    $369.00

  9. Baader Planetarium 2" Polarization Filter - Double

    Baader Planetarium - 2" Polarization Filter - Double

    The Baader 2" Polarizer can attacha a T2-15 adapter, enabling the use of 1.25" eyepiece without removing the filter while keeping the eyepiece and filter position close.

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    Model#: FPOL-2D
    $137.00

  10. TeleVue - Bandmate Mars TYPE B Filter*

    TeleVue - Bandmate Mars TYPE B Filter*

    Bandmate™ Mars Type-B FilterThe Bandmate™ Mars Type-B filter is a high efficiency, single band dielectric coating that achieves penetrating views of the Martian surface. The surface appearance is similar to that of the popular #21 filter ... Learn More
    Model#: BMB-0125
    5% off

    Regular Price: $205.00

    Special Price: $194.75

  11. 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

  12. 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

  13. 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

  14. 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
    $79.95

  15. 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
    $109.95

  16. 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
    $59.95

  17. 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
    $99.95

  18. 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

  19. 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

  20. 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

Items 41 to 60 of 99 total

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