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
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.