Radian Triad Ultra Narrowband Filter 1.25"- For Fast Telescopes | OPT Telescopes
OPT Triad Ultra Filter Review | My Results with a DSLR and Astro Camera
Radian Telescopes - @gmeyer28 coming in hot with The Radian Raptor and Radian Triad Ultra Filter. Such an epic team up of gear with a great photographer in the driver seat. Radian
Triad Ultra Quad Band Filter Thoughts? - Beginning Deep Sky Imaging - Cloudy Nights
OPT Telescopes - Have you heard about the Radian Triad Ultra Filter? This Filter allows you to cut straight through light pollution in even the most heavily light-polluted cities. This image was