ZWO 36mm Narrowband Filter Set with OIII, SII, & Ha Filters - NB7nmD36

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  • The 36mm unmounted narrowband filters in this set are fine-optically polished to achieve a 1/4 wave accuracy
  • Filter performance is improved via multiple layers of anti-reflection coatings
  • A protective plastic filter case is included for each filter
  • This set comes with 36mm OIII, 36mm H-Alpha, and 36mm SII filters
Questions? Let our experts help!
  • Description

    ZWO Narrowband Filter Set with 36mm OIII, SII, and H-Alpha Filters

    These ZWO 36mm filters are unmounted. ZWO narrowband filters are fine-optically polished to reach an accuracy of 1/4 wave. Their performance is further enhanced by multiple layers of anti-reflection coatings.

    ZWO 36mm Unmounted OIII Filter

    OIII, or doubly ionized oxygen, emits light in the blue/green, or teal portion of the spectrum near 500 nm. Planetary nebulae and supernova remnants emit most of their light in the OIII line.

    ZWO 36mm Unmounted Ha Filter

    Hydrogen-Alpha is the most dominant emission line in star-forming regions. H-Alpha light is created by atomic hydrogen and is responsible for the red color seen in most nebulae.

    ZWO 36mm Unmounted SII Filter

    Sulfur is in the deep red of the spectrum near 672 nm. When combined with H-alpha and OIII, these three filters will produce images with colors that are reminiscent of those taken by the Hubble Space Telescope.


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    What's Included

    • ZWO 36mm Round Unmounted H-Alpha Filter
    • ZWO 36mm Round Unmounted SII Filter
    • 36mm Round Unmounted OIII Filter
    • 3x Plastic Filter Cases

  • Dimensions & Specifications

    • Filter Size: 36mm
    • Filter Type: Narrowband Imaging
    • Filter Shape: Round
    • Mounted/Unmounted: Unmounted
    • Filter Set Contents: Ha; OIII; SII

  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    2 years

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

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