ZWO OIII 7 nm Filter - 31mm - OIII7nmD31

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Item #ZWOA-OIII7nmD31

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  • $149.00
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  • High performance unmounted 31mm OIII 7 nm Narrowband Filter from ZWO
  • Combine this filter with ZWO's 31mm H-Alpha and SII filters for a tri-color view that rivals the Hubble Space Telescope
  • 1/4 wave accuracy enabled by fine-optical polishing
  • Multiple layers of anti-reflection coatings further enhance performance
  • This filter includes a plastic filter container for protection when not in use
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  • Description

    ZWO 31mm OIII 7 nm Filter

    This 31mm doubly ionized oxygen (OIII) filter, is made by ZWO and one of the most attractive narrowband imaging filters for astrophotographers. Moreover, if you use this filter with an SII filter and H-Alpha, you will notice increased contrast and enhanced coloring in your images, like the images taken by the Hubble Space Telescope. Planetary nebulae and supernova remnants emit most of their light in the OIII line, which is light in the blue/green, or teal portion of the spectrum near 500 nm. 

    The ZWO OIII 7nm 31mm Filter is 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.


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    What's Included

    • ZWO OIII 7 nm Filter - 31mm
    • Plastic Filter Case

  • Dimensions & Specifications

    • Filter Size: 31mm
    • Filter Type: Narrowband Imaging - OIII
    • Filter Shape: Round
    • Mounted/Unmounted: Unmounted

  • 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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