The Optolong 7nm Narrowband filter sets includes the following items:

  • Optolong H-alpha 7nm
  • Optolong OIII 6.5nm
  • Optolong SII 6.5nm

The H-Alpha, Oxygen-III and Sulphur-II narrow-band filters boost the contrast of emission nebulae and supernova remnants for professional results, even under a bright sky affected by light pollution. This filter is used in combination with the OIII and SII filter to compose a narrowband colour image.


The 7nm band pass (6.5nm for OIII & SII) is only 2% of the entire visible spectrum, increasing the signal to noise ratio and delivering high contrast images and extremely dark backgrounds. The maximum transmission is above 80% and the transmission off band is only 0.1%. This is a value often undisclosed by other filter producers and it is critical to darken the sky background and minimise the halos around the stars. The filter cuts off the ultraviolet and infrared light so there is no need to use the IR-cut filter.


Every Optolong filter is marked with its unique serial number and individual passing band certificate. This test is rarely provided by any producer and it is a standard for high quality filters.

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Optolong 7nm Narrowband SHO Filter Sets

SKU: N/A

$699.00$1,149.00

✅ Fast Shipping & Tracking
✅ Stocked in Melbourne, Australia
✅ Expert Advice
✅ Lifetime Technical Support

    Need Expert Advice?

    Visual Astronomy, Astrophotography, Microscopy and Macro Photography can be a little complicated sometimes as there are a lot of options. If you'd like to check something before you purchase just let us know and we'd be happy to help!

    Enquire now or call us (03) 9042 2293

    Optolong 7nm Narrowband SHO Filter Sets

    SKU: N/A

    $699.00$1,149.00

    The Optolong 7nm Narrowband filter sets includes the following items:

    • Optolong H-alpha 7nm
    • Optolong OIII 6.5nm
    • Optolong SII 6.5nm

    The H-Alpha, Oxygen-III and Sulphur-II narrow-band filters boost the contrast of emission nebulae and supernova remnants for professional results, even under a bright sky affected by light pollution. This filter is used in combination with the OIII and SII filter to compose a narrowband colour image.


    The 7nm band pass (6.5nm for OIII & SII) is only 2% of the entire visible spectrum, increasing the signal to noise ratio and delivering high contrast images and extremely dark backgrounds. The maximum transmission is above 80% and the transmission off band is only 0.1%. This is a value often undisclosed by other filter producers and it is critical to darken the sky background and minimise the halos around the stars. The filter cuts off the ultraviolet and infrared light so there is no need to use the IR-cut filter.


    Every Optolong filter is marked with its unique serial number and individual passing band certificate. This test is rarely provided by any producer and it is a standard for high quality filters.

    Reviews

    There are no reviews yet.

    Be the first to review “Optolong 7nm Narrowband SHO Filter Sets”

    Your email address will not be published. Required fields are marked *

      Need Expert Advice?

      Visual Astronomy, Astrophotography, Microscopy and Macro Photography can be a little complicated sometimes as there are a lot of options. If you'd like to check something before you purchase just let us know and we'd be happy to help!

      Enquire now or call us (03) 9042 2293