Explore Scientific 52° Series 3mm Waterproof Eyepiece

The Explore Scientific 52° Series 3mm Waterproof Eyepiece is the line's highest-power option, built for high-power, on-axis observing of planets, double stars, and bright compact deep-sky objects.

• Field of View: 52° apparent field of view with a flat-field, multi-element optical design.
• Focal Length: 3mm focal length, item number EPWP5203-01.
• Magnification Example: Produces 160X on an ED80mm f/6 telescope, and 405X on an ED152 at f/8 without a Barlow or focal extender, under good seeing conditions.
• Dimensions: 90.9mm long, 43mm wide, and weighs 204.1 grams (7.2 oz).
• Elements: 6 optical elements in 3 groups, edge blackened.
• Coatings: EMD (Enhanced Multi-Layer Deposition) coating on all lens-to-air surfaces, with edge-blackened elements for contrast.
• Waterproofing: O-ring sealed and argon gas purged, tested under 1 meter of water for 30 minutes.
• Eyecup: Removable flip-down soft silicone eyecup with slide-on top and bottom lens caps.
• Barrel & Fit: 1.25" O.D. double-taper barrel that fits standard 1.25-inch filter threads (1.125" x 42 TPI).
• Warranty: Covered by a limited USA one-year warranty when the eyepiece is registered within 60 days of purchase.