Explore Scientific 68° Series 28mm Waterproof Eyepiece

The Explore Scientific 68° Series 28mm Eyepiece offers a wide 68° field of view with long 21.6mm eye relief for comfortable, immersive stargazing. Its 2-inch barrel fits most focusers, and the waterproof, argon-purged design ensures durability and fog-free viewing. Featuring high-quality multilayer coatings, this eyepiece delivers sharp contrast and a flat field, ideal for clear and vibrant astronomical observations. With a parfocal design for consistent focus and easy-to-clean silicone eyecup, it's built for long-lasting performance in any weather.

28mm Focal Length – Delivers wide, low-power views ideal for galaxies, nebulae, and star fields. 68° Apparent Field of View – Provides a full-immersion experience with a wide, flat field. Waterproof & Argon-Purged – Sealed against moisture, dust, and internal fogging; ideal for outdoor use. 21.6mm Long Eye Relief – Offers comfortable viewing, even for eyeglass wearers. Fully Multi-Coated Optics – Enhances brightness, contrast, and resolution. 2-Inch Barrel Size (50.8mm) – Compatible with standard 2" focusers and diagonals. Parfocal Design – Minimizes refocusing when switching between eyepieces in the same series. Durable Construction – Precision-machined metal housing with foldable silicone eyecup for protection and comfort. Field Stop Diameter: 31.8mm – Ensures edge-to-edge clarity and defined field of view. Compact & Lightweight – Measures 91.4mm long, weighs just 16.1 oz (458g).