A terrific addition to or eyepiece upgrade for any high quality telescope, the Meade Series 5000 SWA Eyepieces feature a six element optical design with premium-grade and exotic optical glass for the best possible image sharpness, fully multi-coated lenses for maximum image brightness, blackened lens edges and internal surfaces for enhanced contrast, and a parafocal design for little or no focus change when switching between eyepieces of the series. Comfortable long eye relief, with adjustable twist-up rubber eyeguard.