Radian Triad Tri-Band Narrowband Filter

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  • Regular price $375.00

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  • Check out the Triad Difference
  • Shoot in any light polluted area
  • H-Beta, OIII, and H-Alpha Band Passes
  • 1.25" or 2" filter sizes
  • Works with any color camera including DSLRs


Radian Triad Tri-Band Narrowband Filter

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 1.25" filter is housed in a 7.7mm ring. Please double check to make sure this will fit your filter wheel or accessories.


Check out the Triad Difference


Filter TypeTriband
Free ShippingYes
wavelengthsH alpha/656.3/3nm
wavelengthsOiii/H beta/ Center 493/18nm


  • Triad Tri-Band Filter (1.25" or 2")

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Ask a Question
  • Are there any example photos of this filter used with a DSLR camera? I want to buy the 2" version, but spending $700+ on a brand new revolutionary but unproven product is a bit daunting without seeing several example photos taken on a DSLR. Thanks a lot.

    We will have some examples shot from DSLRs shortly. One person from our staff is currently processing some images shot with his DSLR on his telescope and one of our staff members is going to be shooting images using his DSLR lenses.

    *** Quick update. we now have some images that were shot with a Canon 6D***

  • Would this filter work with a DSLR?

    There are ways to mount this filter onto a DSLR via a sept-down ring that can be found in most DSLR retailers.  I would recommend getting a 52mm to 48mm step-down ring.