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Items 41 to 60 of 93 total

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  1. 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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    FREE SHIPPING
    (48 States)
    Model#: OIII-SCT
    $239.95

  2. 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

  3. 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

  4. 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

  5. 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

  6. Orion 1.25" Orion Mars Observation Eyepiece Filter

    Orion - 1.25" Orion Mars Observation Eyepiece Filter

    The custom-designed Orion Mars Observation filter enhances contrast of virtually all surface features.

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    Model#: 05599
    Sale lasts until Feb 12, 2015!

    Regular Price: $49.99

    Special Price: $39.49

  7. TeleVue - UHC Bandmate Filter 1.25"

    TeleVue - UHC Bandmate Filter 1.25"

    All Tele Vue filters are individually inspected for cosmetic and optical properties, as well as being serialized.

    The NebuStar Filter is a great general purpose filter for all nebulae observation.  Red-blocking properties permit brighter & sharper star images.

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    Model#: BFH-0125
    5% off

    Regular Price: $175.00

    Special Price: $166.25

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

    Regular Price: $60.00

    Special Price: $57.00

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

Items 41 to 60 of 93 total

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