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  1. 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
    Model#: FUVIR-SQ50
    $169.00

  2. Astronomik - OWB Filter - Version II - Canon EOS Clip

    Astronomik - OWB Filter - Version II - Canon EOS Clip

    The Astronomik OWB filter would usually not be designated as an "astronomical" filter.

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    Model#: OWBCCD-EOS
    $169.95

  3. Astronomik - CLS CCD Light Pollution Filter - 36mm Round Unmounted

    Astronomik - CLS CCD Light Pollution Filter - 36mm Round Unmounted

    The Astronomik CLS CCD is suitable under light-polluted skies for DSLR Cameras, which have been remodeled for astronomical use.

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    Model#: CLSCCD-36
    $169.95

  4. 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
    $175.00

  5. Chroma Technology - B-Band 50mm Filter

    Chroma Technology - B-Band 50mm Filter

    ... Learn More
    Model#: B Band 50
    $175.00

  6. IDAS - Hutech - UV/IR Blocking Filter (to be used with MFA37)

    IDAS - Hutech - UV/IR Blocking Filter (to be used with MFA37)

    IDAS Hutech UV/IR Blocking Filter (to be used with MFA37).

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    Model#: UIBAR-37
    $179.00

  7. TO - LP-4  H-Beta (Red Cell)  2"

    TO - LP-4 H-Beta (Red Cell) 2"

    LP-4 H-Beta (Red 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#: LP4-2
    $179.00

  8. TO - LP-3  OIII (Green Cell)  2"

    TO - LP-3 OIII (Green Cell) 2"

    ... Learn More
    Model#: LP3-2
    $179.00

  9. Astronomik - H-Alpha 12nm CCD Filter - 31mm Round Unmounted

    Astronomik - H-Alpha 12nm CCD Filter - 31mm Round Unmounted

    The Astronomik H-alpha filter is a narrow band filter for CCD photography. The filter lets the H-alpha light of emission nebulae pass and blocks nearly the whole remainder of the spectrum where the CCD is sensitive.

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    Model#: HA12-31
    $179.95

  10. Astronomik - OIII 12nm CCD Filter - 31mm Round Unmounted

    Astronomik - OIII 12nm CCD Filter - 31mm Round Unmounted

    The Astronomik OIII CCD filter is a narrow band emission-line-filter for CCD photography.

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    Model#: OIIICCD-31
    $179.95

  11. Astronomik - SII 12nm CCD Filter - 31mm Round Unmounted

    Astronomik - SII 12nm CCD Filter - 31mm Round Unmounted

    The Astronomik SII-CCD filter is a narrow-band-filter for CCD photography.

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    Model#: SII-31
    $179.95

  12. Astronomik - 12nm H-Beta CCD Filter - 31mm Round Unmounted

    Astronomik - 12nm H-Beta CCD Filter - 31mm Round Unmounted

    The Astronomik H-beta filter is a narrow band emission-line filter for CCD photography.

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    Model#: HBCCD-31
    $179.95

  13. IDAS - Hutech - 37mm Nebular Filter II (to be used with MFA37)

    IDAS - Hutech - 37mm Nebular Filter II (to be used with MFA37)

    The IDAS LPS-V4 filter is designed to provide maximum contrast between key astronomical emission lines and a light polluted sky. These filters incorporate IDAS MBT, UFP, and IGAD technologies to insure undegraded and extremely durable optical performance.

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    Model#: LPS-V4-37
    $189.00

  14. IDAS - Hutech - Light Pollution Suppression Filter (to be used with MFA)
  15. Astronomik - CLS Light Pollution Filter - 2" Round Mounted

    Astronomik - CLS Light Pollution Filter - 2" Round Mounted

    The Astronomik CLS is an excellent filter for black & white and color imaging of nebulae, galaxies and star clusters with astronomical instruments of any size.

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    Model#: CLS-2
    $189.95

  16. Astronomik - CLS Visual Light Pollution Filter - 50mm Round Unmounted

    Astronomik - CLS Visual Light Pollution Filter - 50mm Round Unmounted

    The Astronomik Visual CLS is a light pollution filter for black & white and color imaging of nebulae, galaxies and star clusters.

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    Model#: CLS-50R
    $189.95

  17. Astronomik - CLS Light Pollution Filter - SCT Rear Cell
  18. Astronomik - CLS-CCD for Cameras with IR Filter Removed - Canon EOS Clip

    Astronomik - CLS-CCD for Cameras with IR Filter Removed - Canon EOS Clip

    The UV/IR Blocking EOS Clip fits right into the body of you Canon EOS model. Precision laser cut frame is optimized to fit most of the EOS bodies.

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    Model#: CLSCCD-EOS
    $199.95

  19. Astrodon - Photometric Sloan - 1.25" Mounted Gen2 z_s Edge Blackened Filter

    Astrodon - Photometric Sloan - 1.25" Mounted Gen2 z_s Edge Blackened Filter

    NEW!  Astrodon introduces Generation 2 Sloan filters based upon ongoing input from research organizations.  The changes include

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    Model#: z_s2-27R
    $200.00

  20. Astrodon 1.25" dia. Unmounted R Filter

    Astrodon - Photometric UVBRIc - 1.25" Mounted Rc Edge Blackened Filter

    UVBRI filters have been the standard for photometric measurements for decades.  They have evolved over time as technology changed.  H. Johnson in the 1950s and A.W.J. Cousins in the 1970s designed these filters for photomultiplier tubes (PMT).

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    Model#: Rc*-27R
    $200.00

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