Plossl eye Piece 30 mm

The Plossl optical system is fully coated with magnesium fluoride on every air-to-glass surface which provides noticeably less astigmatism and lateral color at field's edge. Lens edges are blackened to reduce scattering of stray light and maximize contrast. The lenses are mounted in black-adodized aluminum housings with a 1.25 Inch-diameter chrome-plated brass barrel for durability and precision fit. The barrel is internally threaded to accept standard telescope filters. The built-in rubber eyeguard enhances viewing by helping to block out ambient light and position the eye.