The Radian Telescopes Triad filter has now been improved upon! With the 50 mm Round Unmounted Triad Ultra, you now have narrower band-passes, more light pollution reduction, higher contrast, better separation between H-beta and OIII channels, and sensitivity in the Sulfur II emission lines. Like the original Triad filter, the Triad Ultra is designed to work with color cameras but also as a narrow-band-luminance filter for monochrome cameras.
|
Hydrogen-beta |
Oxygen III |
Hydrogen-alpha |
Sulfur II |
| FWHM |
5nm |
4nm |
4nm |
4nm |
| Peak Transmission |
79% |
97% |
87% |
90% |
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The Triad Ultra is 100% American made and uses advanced multi-coatings and extreme tolerance glass, to ensure it is always consistent and accurate. Filter thickness is 3 mm.
Below you'll see an incredible image of the Rosette Nebula taken by Jason Guenzel using the Triad Ultra on the super-fast f/2.2 Celestron RASA telescope!Â
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Image Note: Mounted filter is shown for filter view only. This is an Unmounted filter.
- Shoot in any light polluted area
- H-beta, OIII, H-alpha, and SII Band Passes
- Works with any color camera including DSLRs
- Exceptional narrow-band-luminance filter
- 50 mm Round Unmounted Triad Ultra Filter
- Usable on telescopes up to f/2.2 speed!
- Photo Credit: Ross Clark
Image Note: Mounted filter is shown for filter view only. This is an Unmounted filter.
- 50 mm Round Unmounted Triad Ultra Filter
- Filter case
