Orion Sirius Plossl Telescope Eyepieces

• This 40mm eyepiece is ideal for all types of telescopes: reflector, refractor, and catadioptric
• Offers a 43 degree apparent field of view for clear, sharp images of impressively high contrast
• Fully coated with magnesium fluoride on every air-to-glass surface
• Superb for wide-field surveying and detailed observations of large diffuse subjects

It's no surprise that the eyepieces in our Sirius Plossl line are our best-selling eyepieces. Quality this good usually costs a lot more.

Offering a wide 43° apparent field of view, this Sirius Plossl eyepiece provides extremely sharp images of impressively high contrast. It's ideal for all types of telescopes: reflector, refractor, and catadioptric. The Plossl 4-element design is renowned for its outstanding performance, and has become the standard by which all other eyepieces are judged.

Fully Antireflection Coated
The Sirius Plossl optical system is fully coated with magnesium fluoride on every air-to-glass surface. Lens edges are blackened to reduce scattering of stray light and maximize contrast.

The lenses are mounted in black-anodized aluminum housings with a 1.25"-diameter chrome-plated brass barrel for durability and precision fit. The barrel is internally threaded to accept standard filters. The built-in rubber eyeguard enhances viewing by helping to block out ambient light and position the eye.

This 40mm eyepiece yields the largest-possible field of view in a 1.25" barrel. It's superb for wide-field scanning and detailed observations of large diffuse subjects. Largest exit pupil and highest possible brightness.