Explore Scientific 30mm 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.  It's long 19.9mm of  eye relief makes it a joy to put in your scope night after night. Loved by deep sky observers, a 30mm focal length eyepiece produces a large exit pupil which floods your dilated eye with light, which is needed to see faint galaxies and nebulae. Low power eyepieces are very important to observers for a variety of reasons: Their wide true field of view make object location and pointing far easier.; Many deep sky objects are large and are best viewed at the lowest magnifications your telescope/eyepiece combination can achieve. When seeing conditions are poor, objects will often still look sharp at low powers. 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 EPWP5230–01 Focal Length 30mm Length 75.5mm Width 47.8mm Weight 204.1 grams; 7.2 oz. Barrel Size/Type 1.25" O.D. / Double Taper Eye Relief 19.9mm Field Stop Diameter 27.2mm Coatings: EMD (Enhanced Multi-Layer Deposition) on all lens-to-air surfaces Lens Elements/ Groups 4 Elements in 2 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   Tech Details:  Barrel Size 1.25" Eye Relief 19.9mm Field of view 52° Field Stop 27.2mm Focal Length 30mm Number of optical elements 4 Weight 7.2 oz Warranty 1 year