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  1. Baader Planetarium 2" Polarization Filter - Single

    Baader Planetarium - 2" Polarization Filter - Single

    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-2

    Available - Ships in 2-4 Days

    $83.00

  2. Baader Planetarium - UHC-S / L-Booster-Filter 2"

    Baader Planetarium - UHC-S / L-Booster-Filter 2"

    The Baader Planetarium UHC-S Nebula filter excels at delivering a high-contrast and natural view of emission nebula - without excessive dimming and loss of background star fields.

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    Model#: FUHC-2

    In Stock

    $147.00

  3. Baader Planetarium - U-Filter (Venus and Ultraviolet) - 2"

    Baader Planetarium - U-Filter (Venus and Ultraviolet) - 2"

    Another unique and pioneering filter from Baader Planetarium. For the first time, amateurs can now record cloud structures on Venus. The Baader Venus Filter enables amateurs to successfully image in the deep UV, a spectral region normally inaccessible

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    Model#: FUV-2

    Available - Ships in 2-4 Days

    $387.00

  4. Baader Planetarium - UV / IR Cut / L-Filter 50x50mm (3mm glass thickness) Square

    Baader Planetarium - UV / IR Cut / L-Filter 50x50mm (3mm glass thickness) Square

    Baader Planetarium has introduced the world's finest UV/IR cut filter. This filter is a must for all digital imaging with Digital Cameras, CCD Cameras, and modified WebCams ... Learn More
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    (48 States)
    Model#: FUVIR-SQ50

    Available - Ships in 2-4 Days

    $219.00

  5. Baader Planetarium - UV / IR Cut / L-Filter 50.4mm (3mm glass thickness) Round

    Baader Planetarium - UV / IR Cut / L-Filter 50.4mm (3mm glass thickness) Round

    Baader Planetarium has introduced the world's finest UV/IR cut filter. This filter is a must for all digital imaging with Digital Cameras, CCD Cameras, and modified WebCams ... Learn More
    Model#: FUVIR-RD50

    Available - Ships in 2-4 Days

    $156.00

  6. FCB-2

    Baader Planetarium - Contrast Booster 2" Filter

    Much more than a simple minus-violet filter. Based on the popular Baader Moon&Skyglow filter, the Baader Contrast-Booster takes contrast enhancement and skyglow reduction to the maximum level possible from a filter

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    Model#: FCB-2

    In Stock

    $123.00

  7. Celestron - Contrast Booster Filter - 1.25"

    Celestron - Contrast Booster Filter - 1.25"

    This is our newest high quality filter that eliminates most color aberration inherent in achromatic refractor telescopes. The filter also reduces your view of the blue hue around lunar and planetary subjects. Features multi-layer coatings for 95% transmission.

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    Model#: CEL-94121

    Available - Ships in 2-4 Days

    $57.00

  8. 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#: CEL-94119-A

    In Stock

    $13.95

  9. 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.

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    Model#: CEL-94127A

    Available - Ships in 2-4 Days

    $89.00

  10. 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

    Available - Ships in 2-4 Days

    Regular Price: $49.95

    Special Price: $31.95

  11. 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

    In Stock

    $79.95

  12. 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

    In Stock

    $109.95

  13. 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

    In Stock

    $74.95

  14. 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

    In Stock

    $99.95

  15. 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

    Available - Ships in 2-4 Days

    $119.95

  16. 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

    In Stock

    $149.95

  17. 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

    Available - Ships in 2-4 Days

    $89.95

  18. 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

    Available - Ships in 2-4 Days

    $119.95

  19. Lumicon - 2" Infrared Filter

    Lumicon - 2" Infrared Filter

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

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    Model#: LF3145

    Available - Ships in 2-4 Days

    $149.95

  20. 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

    Available - Ships in 2-4 Days

    $104.95

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