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

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

    LP-2 Narrowband (Blue Cell) 2" 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#: LP2-2
    $179.00

  2. 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

  3. TO - LP-1  Broadband (Black Cell)  2"

    TO - LP-1 Broadband (Black Cell) 2"

    Enhanced deep sky viewing with the latest in multi ... Learn More
    Model#: LP1-2
    $149.00

  4. TO - LP-1  Broadband (Black Cell)  1.25"

    TO - LP-1 Broadband (Black Cell) 1.25"

    The Thousand Oaks Optical product line now includes ... Learn More
    Model#: LP1-1.25
    $89.00

  5. TeleVue - OIII Bandmate Filter 2"*

    TeleVue - OIII Bandmate Filter 2"*

    This OIII filter particularly enhances planetary nebulae in larger telescopes Narrowband filter for high transmission, with high blocking of unwanted longer wavelengths to yield high-contrast images ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: BFO-0200
    5% off

    Regular Price: $315.00

    Special Price: $299.25

  6. TeleVue - OIII Bandmate Filter 1.25"*

    TeleVue - OIII Bandmate Filter 1.25"*

    This OIII filter particularly enhances planetary nebulae in larger telescopes Narrowband filter for high transmission, with high blocking of unwanted longer wavelengths to yield high-contrast images ... Learn More
    Model#: BFO-0125
    5% off

    Regular Price: $175.00

    Special Price: $166.25

  7. 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

  8. TeleVue - Bandmate Mars TYPE A Filter*

    TeleVue - Bandmate Mars TYPE A Filter*

    Bandmate™ Mars Type-A FilterWe all know you can't have your cake and eat it too, but the Bandmate™ Mars Type-A filter lets you at least have a good taste! The Type-A is a dual band filter with different dielectric coatings on each side of t ... Learn More
    Model#: BMA-0125
    5% off

    Regular Price: $205.00

    Special Price: $194.75

  9. TeleVue 1.25" Planetary Filter

    TeleVue - 1.25" Planetary Filter

    The TeleVue 1.25" Bandmate Planetary Filter is great to use when observing gas giant planets by combining BK-7 optical glass and a machined aluminum cell to create a reliable planetary filter.

    ...
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    Model#: BPL-0125
    $129.00

  10. Stellarvue Moon Filter

    Stellarvue - Moon Filter - 1.25"

    The Stellarvue 1.25" Moon filter is a 20% transmission neutral density filter that provides a totally color neutral but dimmed view of the Moon.  By dimming the incoming light, moon filters allow you to see finer details on the lunar surface. ... Learn More
    Model#: XM
    $12.00

  11. 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

  12. Orion OIII Nebula Telescope Filter 2"

    Orion - OIII Nebula Telescope Filter 2"

    You can't turn up the luminosity on nebulas, but you can crank up the contrast between them and the sky to reveal more of their wondrous detail.

    ...
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    Model#: ORI-05582
    $168.99

  13. Orion OIII Nebula Telescope Filter 1.25"

    Orion - OIII Nebula Telescope Filter 1.25"

    1.25in ... Learn More
    Model#: ORI-05581
    $116.99

  14. Orion Moon Filter 13% Transmission 1.25"

    Orion - Moon Filter 13% Transmission 1.25"

    The Moon's disk, even at partial phases, is intensely bright with reflected sunlight. The glare washes out most of the craters, rilles, and other surface details from view

    ...
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    Model#: 05662
    $19.99

  15. Orion Deluxe Stargazer's 1.25" Eyepiece Filter Set
  16. Orion 2" Hydrogen-Beta Nebula Eyepiece Filter
  17. Orion 1.25" Sulfur-II Extra-Narrowband Filter

    Orion - 1.25" Sulfur-II Extra-Narrowband Filter

    Now you can capture dramatic Hubble-like CCD images of emission nebulas from the heart of the city or under a full Moon.

    ...
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    Model#: ORI-05579
    $168.29

  18. 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
    $53.99

  19. Orion 1.25" Mars Observation Eyepiece Filter Set

    Orion - 1.25" Mars Observation Eyepiece Filter Set

    You may not see little green guys with antennae, but you will resolve plenty of subtle features with this Orion Mars-optimized telescope filter set. It consists of three 1.25" glass filters in threaded aluminum cells:

    ...
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    Model#: 05591
    $84.65

  20. Orion 1.25" Luminance/IR Cutoff Astrophotography Filter

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