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IDAS NBZ Nebula Booster Filter - 48mm


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  • This is the updated version of the IDAS NBX filter, correcting for the "halo" effect present on the previous NBX model filters by reducing internal reflection.
  • Nothing else has changed between the previous and updated model.

Product Details

  • The IDAS Nebula Booster 48mm Filter is designed to enhance the contrast of Ha (Hydrogen Alpha) and OIII (Oxygen II) emission nebula while accommodating the filter spectral shift when used with modern fast optical systems. This dual-band filter is ideal for one-shot color cameras, as well as mono-color astronomical cameras.

    Proprietary IDAS Sophisticated Optics Technology

    Ion-Gun Assist Deposition (IGAD) coating technology is used by IDAS for these astronomical filters. This results in superior filters with robust coatings and long-term spectral stability, even with temperature and humidity extremes. This stability is especially important for bandpass curves with steep slopes (narrowband filters). This technology helps to virtually eliminate bandpass shifts from the +/-3 or 4nm typical of standard coating filters.

    The Multi Bandpass Technology (MBT) is used in conjunction with the IGAD hard-coating technology to further elevate IDAS filters. This technology allows IDAS to create very complicated filters for astronomical use.

    Ultra Fine Polish (UFP) Finishing really sets IDAS filters apart from the competition. They are polished twice as long as is typical for optical glass. In combination with the use of high-quality substrate glass, no scratches, bubbles, or other defects are visible even under microscopic inspection.


    Ha Bandpass

    OIII Bandpass


    This filter has ideal flat-top bandpass, as well as in-band transmission. The off-center bandpass accommodates off-axis rays for fast optics (up to f/2). The steep bandpass edges help to minimize internal reflections. It is able to fully block NIR up to 1200nm.

  • specifications

    Filter ShapeRound
    Filter Size48mm
    Filter Thickness2.5mm
    Filter TypeSpecialty Filters
  • included items

    • This is the updated version of the IDAS NBX filter, correcting for the "halo" effect present on the previous NBX model filters by reducing internal reflection.
    • Nothing else has changed between the previous and updated model.

Product Reviews

Customer Reviews
5.0 Based on 6 Reviews
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  • filter
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  • dark skies
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  • hyperstar
  • pollution
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  • RASA 8
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David M.
United States United States

Love this.

This filter has changed my Dso imaging from meh to great. So glad I got it. Very excited for the coming year of imaging. I use this with Hyperstar. No halos.

Joe F.
United States United States

Best filter yet

This filter is Great and I highly recommend it. I just cannot tell u how much better my images are, and you will see the same. I am in Bortle 9 skies, yet I get images where it appears I am in Bortle 2-3 skies, truly amazing! The cost is very reasonable compared to having an hour or 2 drive, to get to dark skies, now I can image from home!!!! Thanks OPT and IDAS!!!!!

Blaine K.
United States United States

One of the best

This filter is one of the better performing ones i have tested. The NBZ filter is good for F7 and faster scopes. I have only tested this so far with my c11 edge hd and hyperstar v4 during a full moon. The filter did a great job not only cutting the light pollution but also the glare from the moon. Its not as good as a narrowband Ha filter but the data is quite useable. Very impressed. Im also impressed that bright stars have very little halo. The antireflective properties are pretty amazing.

Douglas T.
United States United States

Amazing filter for RASA

the NBZ and RASA 8 are a great combination. I was able to shoot the Veil Nebula and M27 (Dumbbell) under a full moon and get pretty decent results. Haven't tried it yet under dark skies, but I am really looking forward to seeing what it can do. This filter works great with fast scopes like the RASA (f2) and doesn't seem to suffer the same loss of signal that the Optolong L-Extreme does.

OPT Telescopes IDAS NBZ Nebula Booster Filter - 48mm Review
Tim S.
United States United States

Works great with Hyperstar v4 C11

I am new to astrophotography. My current set up is a Celestron C11 with a Hyperstar v4 C11 and my camera is a ZWO 2600 mc pro. OPT recommended this filter for my set up, Despite high clouds and waxing gibbous moon, I was able to squeeze in 9 min of data for the Gamma Cygni region (3 x 3 min) and 27 min of data (9 x 3 min) of the North American Nebula. Given the less than optimal conditions, this is my new go to filter. I am excited to put this to a more rigorous test under clear dark skies, and learn the art of astrophotography.

OPT Telescopes IDAS NBZ Nebula Booster Filter - 48mm ReviewOPT Telescopes IDAS NBZ Nebula Booster Filter - 48mm Review
Patrick D.
United States United States

RASA 8 and NBZ made for each other

Anyone who has invested in a RASA must be interested in getting the best images of nebulae possible. The Fast F2 optics of the RASA makes spectral shift of Oiii and H-alpha lines a major problem for most other dual pass filters. Not the NBZ. I’ve only had a chance to image M42, California and Rosette Nebs but the results were very good. Even a 1 min exposure of the last two gives satisfying results before aligning, stacking and Ps stretching. The latter manipulations gave me the best images I’ve taken in my short imaging career. If you have a fast setup and want to shoot nebulae, you need to try this out.