Explore Scientific 3mm 52° Series Waterproof Eyepiece

Looking for something out of the ordinary for your next eyepiece?  The Explore Scientific 52° series is a strong contender for necessary addition to your eyepiece collection. Looking for something out of the ordinary for your next eyepiece?  The Explore Scientific 52° series is a strong contender for necessary addition to your eyepiece collection.  It's long 15mm of  eye relief makes it a joy to put in your scope night after night. Designed for high-power on-axis observations, the Explore Scientific 3mm 52° Series Waterproof Eyepiece is fully EMD (Enhanced Multi-Layer Deposition) Coated with edge blackened lenses providing the contrast required for serious high-power observing of planets, close-paired double stars, and bright compact deep sky objects. With a flat apparent field of view of 52 degrees, these eyepieces offer incredible value. While some might question the need for Argon-Purged waterproof eyepieces, it is a nice concept knowing the inside of your eyepiece will be just as perfect as the day it left the assembly line.  No need to worry about dust, or cleaning solution, finding its way inside the elements.  These eyepieces are designed to be used night after night giving you complete peace of mind about their performance. Tech Details: Item Number EPWP5203–01 Focal Length 3mm Length 90.9mm Width 43mm Weight 204.1 grams; 7.2 oz. Barrel Size/Type 1.25" O.D. / Double Taper Eye Relief 15mm Field Stop Diameter 2.7mm Coatings: EMD (Enhanced Multi-Layer Deposition) on all lens-to-air surfaces Lens Elements/ Groups 6 Elements in 3 Groups; Edge Blackened Filter Thread Fits Standard 1.25-inch Dia. Thread in Filters (1.125-inches x 42 TPI) Waterproof O-Ring Sealed Argon Gas Purged; Tested Under 1 Meter of Water for 30 Minutes Eyecup Removable Flip-Down Style Soft Silicone Rubber Lens Caps Slide-on Top and Bottom Materials Optical Glass; Aluminum; Steel; Silicone Rubber Markings Laser Engraved: Focal Length; Series; Serial Number; Brand