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Radian Telescopes 2" Triad Tri-Band Narrowband Filter


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  • Check out the Triad Difference
  • Shoot in any light polluted area
  • H-beta, OIII, and H-alpha Band Passes
  • 2-inch filter size
  • Works with any color camera including DSLRs

Product Details

  • Dealing with light pollution is the biggest challenge for astrophotographers. Until now taking narrowband color images involved the complexity and high cost of upgrading your camera with a filter wheel, 3 or more filters, adapters, and software. Now there is a more affordable all new option that delivers dramatic detailed images even in bright settings.

    Triad is a revolutionary multi-band filter technology that passes only H-alpha, H-beta, and Oxygen III emission lines enabling any color camera to now capture RGB narrowband images. It’s an affordable single-filter option guaranteed to dramatically reduce light pollution and increase your signal even in bright urban and moonlight settings.

    Engineered specifically for use with DSLR, CMOS, and CCD color cameras, Triad features advanced multi-coatings and extreme tolerance glass, making it the most consistent and accurate light pollution suppression filter available. 100% American made.

    The Triad 2-inch filter is housed in a 7mm tall ring, with 5mm height above the threads. The ring wall thickness is between 1.3 and 2.58mm - depending on production batch. Please double check to make sure this will fit your filter wheel or accessories.


    Check out the Triad Difference

  • specifications

    Filter ShapeRound
    Filter Thickness3mm
    Filter TypeLight Pollution/City Light Suppression
    Free ShippingYes
  • included items

    • Triad Tri-Band Filter (2-inch)

Product Reviews

Customer Reviews
5.0 Based on 3 Reviews
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Filter Reviews:
United States United States
Light Pollution Killa

Just wanted to add a true performance of this filter with no process of a single frame image of 3 minutes from a badly light polluted skies of Sacramento, CA.

OPT Telescopes Radian Telescopes 2 Triad Tri-Band Narrowband Filter Review
Neik P.
United States United States
Light Pollution Killa.

I took a chance on buying this filter to try to combat the bottle 8 light pollution in my area. So far, it has not disappoints me yet. Figuring out the optimum exposure time and gain for it still an uphill challenge, but soon will conquer.

Kurt A.
United States United States
I'm a firm believer in the triad

I've always done narrowband with a mono cam, so at first I was a bit skeptical. I decided to jump on the hype train and see what it was all about. The hype is real my astro friends! I have taken images with this filter using just a normal dslr and i am just amazed how I can do narrowband Astrophotography with just a DSLR. Now I haven't used an osc yet but I believe it would be even better. This filter is perfect for those wanting to image in their backyard with a DSLR or color camera. We've all been there before; it's clear at the dark site but its hours away and something came up where you couldn't spot the gas for the trip. You feel defeated and sad that you can't image that night. But now you have not to worry of those moments as now you'll have a filter to help you at home even in the most severe light polluted skies. This filter is well worth the price and costs much less than getting the separate halpha, hbeta and oiii filters. It also will cost much less in the long run than all those trips to dark sites in gas and save you wear and tear on your vehicle. I'm a believer! Tell em Kurt sent ya!