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50mm Filters

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  1. Optolong - UBVRI Filter Set - 50mm Unmounted

    Optolong - UBVRI Filter Set - 50mm Unmounted

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    (48 States)
    Model#: UBVRI-50U
    $855.00

  2. Optolong - UBVRI Filter Set - 50mm Square Unmounted

    Optolong - UBVRI Filter Set - 50mm Square Unmounted

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    (48 States)
    Model#: UBVRI-50SQ
    $901.00

  3. Optolong - SII CCD 6.5nm Filter - 50mm Square Unmounted

    Optolong - SII CCD 6.5nm Filter - 50mm Square Unmounted

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    (48 States)
    Model#: SIICCD65-50SQ
    $299.00

  4. Optolong - SII CCD 12nm Filter - 50mm Unmounted

    Optolong - SII CCD 12nm Filter - 50mm Unmounted

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    (48 States)
    Model#: SIICCD12-50U
    $209.00

  5. Optolong OIII CCD 6.5nm Filter - 50mm Unmounted

    Optolong - OIII CCD 6.5nm Filter - 50mm Unmounted

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    Model#: OIIICCD65-50U
    $269.00

  6. Optolong - OIII CCD 6.5nm Filter - 50mm Square Unmounted

    Optolong - OIII CCD 6.5nm Filter - 50mm Square Unmounted

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    Model#: OIIICCD65-50SQ
    $299.00

  7. Optolong OIII CCD 12nm Filter - 50mm Square Unmounted

    Optolong - OIII CCD 12nm Filter - 50mm Square Unmounted

    The Optolong Oxygen III 12nm Narrowband Filter transmits a 12nm bandwidth of light that is focused at 500nm and definitely decreases other transmissions, including wavelengths of light that cause light pollution (both artificial and natural).

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    Model#: OIIICCD12NM-50SQ
    $249.00

  8. Optolong - L-Pro Filter - 50mm Unmounted

    Optolong - L-Pro Filter - 50mm Unmounted

    The Optolong L-Pro filter delivers better color balance by maximizing transmission band, permitting you to create pictures of broadband objects with emission spectral lines.

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    (48 States)
    Model#: LPRO-50U
    $219.00

  9. Optolong H-Alpha 7nm CCD Filter - 50mm Unmounted

    Optolong - H-Alpha 7nm CCD Filter - 50mm Unmounted

    The Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

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    (48 States)
    Model#: HAL7-50U
    $259.00

  10. Optolong - H-Alpha 7nm CCD Filter - 50mm Square Unmounted

    Optolong - H-Alpha 7nm CCD Filter - 50mm Square Unmounted

    The Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

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    (48 States)
    Model#: HAL7-50SQ
    $299.00

  11. Optolong H-Alpha 12nm CCD Filter - 50mm Unmounted

    Optolong - H-Alpha 12nm CCD Filter - 50mm Unmounted

    The Optolong H-Alpha 12nm Narrowband Filter works by permitting a 12nm light bandwidth, focused on the 656nm wavelength through, and hindering the transmission of contrast-killing light pollution wavelengths.

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    Model#: HAL12-50U
    $209.00

  12. Optec - #8 Pale Yellow, 50mm diam. x 2mm thick.

    Optec - #8 Pale Yellow, 50mm diam. x 2mm thick.

    Does a better job blocking the violet and UV at the expense of ... Learn More
    Model#: 17231
    $30.00

  13. Optec - #47B Blue, 50mm diam x 2mm thick

    Optec - #47B Blue, 50mm diam x 2mm thick

    This filter is used for RGB imaging to pass the blue band ... Learn More
    Model#: 17236
    $30.00

  14. Optec - #29 Deep Red, mounted in 48mm threaded cell.

    Optec - #29 Deep Red, mounted in 48mm threaded cell.

    #29 Deep Red - Passes light longer that 610 nm. This filter is a little more effective than the #23A in dakening the sky ... Learn More
    Model#: 17437
    $45.00

  15. Optec - #23A Light Red,  50mm diam x 2mm thick

    Optec - #23A Light Red, 50mm diam x 2mm thick

    Blocks blue and green light completely, passes light longer than ... Learn More
    Model#: o17235
    $30.00

  16. Optec - #21 Orange, 50mm diam x 2mm thick

    Optec - #21 Orange, 50mm diam x 2mm thick

    Optec - #21 Orange, 50mm diam x 2mm thick ;Blocks blue completely and ... Learn More
    Model#: 17233
    $30.00

  17. Optec - #12 Yellow, 50mm diam x 2mm thick

    Optec - #12 Yellow, 50mm diam x 2mm thick

    Optec - #12 Yellow Wratten filter 50mm x2mm ... Learn More
    Model#: 17232
    $30.00

  18. IDAS - Hutech - 50mm Unmounted LPS Filter

    IDAS - Hutech - 50mm Unmounted LPS Filter

    Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.

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    Model#: LPS-P2-50
    $189.00

  19. FLI - Research Grade 50mm Diameter UBVRI Filters

    FLI - Research Grade 50mm Diameter UBVRI Filters

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes.

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    (48 States)
    Model#: RG-50D-UBVRI
    $1,250.00

  20. FLI - Research Grade 50mm Diameter SII

    FLI - Research Grade 50mm Diameter SII

    FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. FLI offers a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

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    (48 States)
    Model#: RG-50D-SII
    $545.00

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