Explore Scientific 24mm 82 degree Series Argon-Purged Waterproof Eyepiece. This eyepiece manufactured by the product specialists 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 24mm 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. The Explore Scientific 24mm 82 Series Ultra-Wide Argon-Purged Eyepiece promotes relaxation to your eyes to prolong the enjoyment of observing the universe. Specifications for Explore Scientific 24mm 82 Series Ultra-Wide Argon-Purged Waterproof Eyepiece: Focal Length: 24mm Length: 110mm Width: 70mm Weight: 24.8oz; 704g Barrel Size: 2.00" Eye Relief: 17.5mm Field Stop Diameter: 33.5mm Package Contents: Explore Scientific 24mm 82 Degree Series Argon-Purged Waterproof Eyepiece 82 Series 24mm Argon-Purged Waterproof Eyepiece; 2.0-inch O.D.