Using advanced computer design, combinations of low dispersion and high refractive index optical glasses and durable multilayer deposition coatings, the Explore Scientific 14mm 100deg. Series Argon-Purged Waterproof Eyepiece is optimized to produce high contrast, high resolution and superior flat field characteristics. The visual effect of this eyepiece with its long eye-relief and its 100deg. apparent field is truly a full-immersion experience.
It comes with a removable and foldable soft silicone rubber eyecup 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.