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Radian Telescopes 52mm Triad Ultra Quad-Band Narrowband Filter

ITEM #
OS-TRIAD-ULT52MM
  • Price:
  • Sale
  • Regular price $1,175.00

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Accessories Added

  • 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

DESCRIPTION

Radian Telescopes 52mm Triad Ultra Quad-Band Narrowband Filter

The Radian Triad Ultra filter has now been improved upon! With the 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%

 

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.

Since the filter has extremely narrow band passes, telescopes with focal ratios faster than f/4 will move transmission off band. Telescopes with focal ratios between f/2.9 and f/3.9 are compatible with Triad Ultra, with lower transmissions. Telescopes with focal ratios faster than f/2.8 are incompatible with the Triad Ultra filter.

SPECIFICATIONS

Filter ShapeRound
filter sizePhotographic 52mm
Filter Thickness3mm
Filter TypeQuadband

INCLUDED ITEMS

  • Photographic 52 mm Triad Ultra Filter
  • Radian microfiber cloth
  • Filter case