ZWO 1.25" Narrowband Filter Set with OIII, SII, & Ha Filters - NB7NMD1.25

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Item #ZWOA-NB7NMD1.25

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  • $369.00
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  • Housed in a 1.25" round metal cell, these filters features multiple anti-reflection coating layers and transmit up to 80% of light
  • Fine-optically polished to allow 1/4 wave accuracy to be achieved
  • Each filter is shipped with its own individual plastic storage container
  • This set includes 1.25" H-Alpha, 1.25" SII, and 1.25" OIII filters
Questions? Let our experts help!
  • Description

    ZWO Narrowband Filter Set with 1.25" OIII, SII, and H-Alpha Filters

    These ZWO 1.25" filters are mounted in a metal cell and come in a plastic storage box. ZWO narrowband filters are fine-optically polished to reach an accuracy of 1/4 wave, and they are capable of light transmission up to 80%. Their performance is further enhanced by multiple layers of anti-reflection coatings.

    ZWO 1.25" Mounted 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 1.25" Mounted 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. The Ha portion of the spectrum is at 656 nm.

    ZWO 1.25" Mounted SII Filter

    Sulfur is in the deep red of the spectrum near 672 nm. When combined with H-a 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 1.25" Round Mounted H-Alpha Filter
    • ZWO 1.25" Round Mounted SII Filter
    • ZWO 1.25" Round Mounted OIII Filter
    • 3x Plastic Filter Cases

  • Dimensions & Specifications

    • Filter Size: 1.25" (31.75mm)
    • Filter Type: Narrowband Imaging
    • Filter Shape: Round
    • Mounted/Unmounted: Mounted
    • 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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