Explore Scientific 11mm 82° Nitrogen-Purged Waterproof 1.25" Eyepiece. 7 exotic glass element design, offering 15mm Eyerelief, full multicoating, contrast-boosting edge blackening. Explore Scientific have used advanced ray-tracing computer design to produce a range of extremely competitive eyepieces. Ideal for planetary and lunar work, this 11mm 82° 1.25" design is completely waterproof, meaning it will not fog up in moist conditions, is impervious to dew and can even be cleaned and rinsed underwater! The quality construction includes flip up eyecups, finely machined all-metal lens barrels and dead black internal surfaces, minimising light scatter and internal reflections.