With a wide 50-deg apparent field, our Sirius Plossl line of eyepieces provide clear, sharp images of impressively high contrast. They're suitable all telescope types: reflector, refractor, and catadioptric. Each 4-element S...

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With a wide 50-deg apparent field, our Sirius Plossl line of eyepieces provide clear, sharp images of impressively high contrast. They're suitable all telescope types: reflector, refractor, and catadioptric. Each 4-element Sirius Plossl is multi-coated with magnesium fluoride for optimal light transmission and bright views. Lens edges are blackened to reduce scattering of stray light and maximize contrast. Lenses are mounted in black anodized aluminum housings with 1.25" chrome-plated brass barrels. Each is fitted with rubber eyeguards and internally threaded to accept standard filters.

  • This 6.3mm Orion Sirius Plossl eyepiece is ideal for all types of telescopes: reflector, refractor, and catadioptric
  • Superb 6.3mm focal length 1.25" eyepiece for high-power planetary and lunar observation in any telescope
  • Offers a 52 apparent field of view for clear, sharp views of impressively high contrast
  • Fully coated optics with magnesium fluoride on every air-to-glass surface to reduce reflection and increase light transmission
  • Eyepiece barrel threaded for use with 1.25" Orion filters
  • This 6.3mm Orion Sirius Plossl eyepiece is ideal for all types of telescopes: reflector, refractor, and catadioptric
  • Superb 6.3mm focal length 1.25" eyepiece for high-power planetary and lunar observation in any telescope
  • Offers a 52 apparent field of view for clear, sharp views of impressively high contrast
  • Fully coated optics with magnesium fluoride on every air-to-glass surface to reduce reflection and increase light transmission
  • Eyepiece barrel threaded for use with 1.25" Orion filters

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