It's no surprise that these are our best-selling eyepieces. Quality this good usually costs a lot more.

Offering a wide 52° apparent field of view (43° for the 40mm), Sirius Plossls provide extremely sharp images of impressively high contrast. They're 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 1.25"-diameter chrome-plated brass barrels for durability and precision fit. Each barrel is internally threaded to accept standard filters. The built-in rubber eyeguards enhance viewing by helping to block out ambient light and position the eye.

An Eyepiece for Every Target
Sirius Plossls are available in a variety of focal lengths. The 7.5mm and 6.3mm are superb for high-power planetary and lunar observation, and well suited to double-star viewing when stable seeing conditions permit.

The 10mm is a great, moderately high power ocular for observing small planetary nebulas and globular star clusters, as well as for planetary probing when seeing conditions don't permit higher magnifications.

The 12.5mm, a useful intermediate focal length, performs well on both deep-sky and planetary subjects.

A medium-power eyepiece, the 17mm is perfect for broad-field lunar observations, medium-sized star clusters, and a wide range of nebular objects.

For moderately low power scanning of open star clusters, and viewing of extended nebulas and larger galaxies, the 20mm and 25mm models excel.

The 32mm offers a very wide true field and a wide apparent field, for dramatic visual effects.

The 40mm model 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.

This Sirius Plossl Starter Set includes three eyepieces: our 10mm, 17mm, and 25mm models.

This Sirius Plossl Expansion Set includes three eyepieces: our 7.5mm, 12.5mm, and 20mm models.

This Sirius Plossl Power Pair includes two eyepieces: our 7.5mm and 12.5mm models.