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Explore Scientific 68° Argon Purged Eyepiece 20mm 1.25"


Quick Overview

20mm Argon purged high performance eyepiece with 68° apparent field
Waterproof, Argon purged and sealed against dust
Large and sharp 68° field
EMD-fully multi-coated with blackened lens edges
All eyepieces of this series are parfocal
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The Explore Scientific 68° Argon Purged Eyepiece 20mm 1.25" is an excellent mid-power eyepiece option, with a sharp, well defined field - right to the edge. With the introduction of the 68° Series Explore Scientific made two important improvements in eyepiece manufacture, the first being 15 layer Enhanced Multi-layer Deposition (EMD™) coatings on all glass-to-air surfaces to gain maximum contrast and secondly, fully waterproofing the interior of the eyepiece with the use of Argon gas purging instead of standard Nitrogen gas. Although Nitrogen is a fine choice that will last for many years, Argon is a larger molecule that maintains its protective properties over a wider range of temperatures, and is even more resistant to diffusion thereby further extending the protective waterproof environment of the eyepiece body. Through computer-optimized design, a careful selection of optical glasses, and enhanced multi-layer deposition coatings, the Explore Scientific 68° Series™ eyepieces produce long eye-relief and ensure high image-correction, a flat field, and high contrast across the entire image field. An excellent choice for those who make extended visual studies of detail with subtle variations of brightness, and for those who must wear glasses while observing. All 68° Series eyepieces are fully EMD (Enhanced Multi-Layer Deposition) coated and edge-blackened to produce superior contrast.


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Rubber eyecups, foldable

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