Explore Scientific 14mm 82 degree Series Argon-Purged Waterproof Eyepiece. This eyepiece designed by the experts at Explore Scientific is ultra-wide for comfort with which you can gaze not directly at an object but slightly to either side. With averted vision the Explore Scientific 14mm 82 Series Hyper-Wide Argon-Purged Eyepiece is especially helpful when observing faint objects that puts the image on a part of your eye that is more sensitive to light. Relax your eyes and enjoy the night sky view with the Explore Scientific 14mm 82 Series Ultra-Wide Argon-Purged Eyepiece. Specifications for Explore Scientific 14mm 82 Series Ultra-Wide Argon-Purged Waterproof Eyepiece: Focal Length: 14mm Length: 83mm Width: 48mm Weight: 9.0oz; 256g Barrel Size: 1.25" Eye Relief: 15.6mm Field Stop Diameter: 18.9mm Package Contents: Explore Scientific 14mm 82 Degree Series Argon-Purged Waterproof Eyepiece 82 Series 14mm Argon-Purged Waterproof Eyepiece; 1.25-inch O.D.