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  1. 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

  2. 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

  3. 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

  4. TeleVue - UHC Bandmate Filter 2"*

    TeleVue - UHC Bandmate Filter 2"*

    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 ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: BFH-0200
    5% off

    Regular Price: $315.00

    Special Price: $299.95

  5. 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.

    ...
    Learn More
    Model#: BFH-0125
    5% off

    Regular Price: $175.00

    Special Price: $166.25

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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#: 05582
    Sale lasts until Feb 12, 2015!

    Regular Price: $159.99

    Special Price: $125.99

  11. Orion OIII Nebula Telescope Filter 1.25"

    Orion - OIII Nebula Telescope Filter 1.25"*

    1.25in ... Learn More
    Model#: 05581
    Sale lasts until Feb 12, 2015!

    Regular Price: $109.99

    Special Price: $86.49

  12. 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
    Sale lasts until Feb 12, 2015!

    Regular Price: $19.99

    Special Price: $15.99

  13. Orion Deluxe Stargazer's 1.25" Eyepiece Filter Set

    Orion - Deluxe Stargazer's 1.25" Eyepiece Filter Set*

    ... Learn More
    Model#: 05590
    Sale lasts until Feb 12, 2015!

    Regular Price: $144.99

    Special Price: $114.49

  14. Orion 2" Hydrogen-Beta Nebula Eyepiece Filter

    Orion - 2" Hydrogen-Beta Nebula Eyepiece Filter*

    ... Learn More
    Model#: 05584
    Sale lasts until Feb 12, 2015!

    Regular Price: $129.99

    Special Price: $125.99

  15. 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#: 05579
    Sale lasts until Feb 12, 2015!

    Regular Price: $159.99

    Special Price: $136.49

  16. 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

  17. 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
    Sale lasts until Feb 12, 2015!

    Regular Price: $79.99

    Special Price: $62.99

  18. Orion 1.25" Luminance/IR Cutoff Astrophotography Filter

    Orion - 1.25" Luminance/IR Cutoff Astrophotography Filter*

    ... Learn More
    Model#: 05564
    Sale lasts until Feb 12, 2015!

    Regular Price: $49.99

    Special Price: $39.49

  19. Orion 1.25" Hydrogen-Beta Eyepiece Filter

    Orion - 1.25" Hydrogen-Beta Eyepiece Filter*

    A Hydrogen-Beta telescope filter may be the only way to see the faint and elusive Horsehead, California, and Cocoon Nebulas.

    ...
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    Model#: 05583
    Sale lasts until Feb 12, 2015!

    Regular Price: $109.99

    Special Price: $86.49

  20. Orion 1.25" H-Alpha Extra-Narrowband Filter

    Orion - 1.25" H-Alpha Extra-Narrowband Filter*

    Get Great Nebula Images Under City Lights or a Full Moon with the Orion Hydrogen-Alpha Extra Narrowband Astrophotography Filter!

    ...
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    Model#: 05587
    Sale lasts until Feb 12, 2015!

    Regular Price: $179.99

    Special Price: $136.49

Items 21 to 40 of 342 total

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