An ultrawide 82° field and argon-purged waterproof construction w/superb coatings all combine to make these the "Everyman's Series", useful on every type of object. 6.7mm FL

• Optical Design: 7 Elements; Combination of: Dense Crown, Light Crown, Dense Flint, and Lanthanum Optical Glasses*
• Apparent Field: 82°
• Coatings: EMD™ (Enhanced Multilayer Deposition) Coatings
• Body: Anodized Black Aluminum; Laser-Etched Description and Serial Number; Rubber Grip: Internally O-Ring Sealed and Argon Purged
• Barrel: Stainless-Steel, Double Taper, Accepts Standard Filters
• Eyecup: Rubber Folding Type

All 82° Series eyepieces are fully multi-coated and edge-blackened to produce maximum contrast.
Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 82° Series™ extreme wide field eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics.
The visual effect of these eyepieces with their comfortable eye-reliefs and their 82° apparent fields is truly a full-immersion experience. Your eye is relaxed, allowing you to easily use the "averted vision" technique to study faint details across a huge field-of-view.
Precision polished eyepiece lenses are lowered into a bath chamber for ultrasonic cleaning to rid the lenses of dirt or other contaminants prior to the multi-layer transmission coating process.
Each eyepiece is meticulously assembled into precision-machined metal lens barrels that maintain the perfect alignment of the optical train for years of rugged use in the field. The 82° Series eyepieces come with a flip-up rubber eye-guard that raises to a desirable height for the comfort of the observer, and as experienced astronomers know, eye comfort is critical when trying to observe at the visual limits of the telescope.
To keep internal reflections to a minimum, all internal surfaces of the eyepiece barrel are flat black, as well as the edges of the lenses themselves to minimize the scattering of light within the lenses themselves.
In today's modern telescope industry there are many fine companies to choose from manufacturing top quality eyepieces. We invite direct side-by-side comparison with any other eyepiece of similar design, and we back our eyepieces with our exclusive Explore STAR Transferrable Extended Life of the Product Warranty.* We think that you will find Explore Scientific eyepieces rank among the finest obtainable and represent an outstanding value.
*Limited Warranty is one year, which converts to the Explore STAR Transferrable Extended Life of the Product Warranty when product is registered within 60 days of purchase.
Developing our new eyepieces we wanted to take a fresh perspective and address several points. Our goal was to produce an ultra-wide angle design that provides pride of ownership at a great value:
Focus on Value - We invite direct comparison to any eyepieces on the market in their category.
Protection from the Outdoors - By making the eyepiece body argon-purged and waterproof, eyepiece internal elements will remain as pristine as the day they were assembled. The sealed, dry environment is impervious to internal fogging and contaminants such as fungus growing in between the lens elements. Our waterproof eyepiece is easier to clean, and there is no risk of cleaning solution migrating from the top of the lens and seeping around edges to be trapped in between elements. To insure a perfect seal we test every eyepiece in one meter of water for 30 minutes.