Explore Scientific 82° Series 18mm Waterproof Eyepiece

The Explore Scientific 82° Series 18mm eyepiece sits in the upper-medium power range, built for observing globular clusters, planetary nebulae, comet cloud structure, and early planetary detail where more magnification is wanted without losing apparent field. Its 82-degree field of view and generous eye relief promote a relaxed eye that makes the averted-vision technique for spotting faint objects easier to use for longer sessions. Because it's compatible with Explore Scientific's Focal Extenders, the same eyepiece can jump to 2x, 3x, or 5x magnification while keeping its native apparent field and eye relief intact.

• 82° apparent field of view: Immersive wide-field view with 13mm of eye relief for comfortable extended observation.
• Compatible with Focal Extenders: Increases magnification 2x, 3x, or 5x while maintaining the eyepiece's native field and eye relief.
• Precision machined metal barrels: Flat black internal surfaces minimize reflections and light scattering.
• EMD multilayer coatings: Low dispersion, high refractive index glass delivers high contrast and a flat field.
• Supports averted vision technique: The relaxed, wide field makes it easier to spot faint objects during long observation sessions.
• Extended transferable warranty: A 1-year limited warranty converts to Explore Scientific's STAR Transferable Extended Life Warranty upon registration within 60 days.