Explore Scientific 100 Degree Series 20mm Nitrogen-Purged Waterproof Eyepiece 2" Barrel

Priced: $299.99
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Explore Scientific 100 Degree Series 20mm Nitrogen-Purged Waterproof Eyepiece 2" Barrel -

The Explore Scientific 100 Degree Series 20mm Nitrogen-Purged Eyepiece is the world's first to break the 20mm focal length barrier in the hyper-wide 100 degree apparent field eyepiece category. The 100 Degree 20mm gas-purged waterproof produces pinpoint stars to the edge of the field of view and the eyepiece body is nitrogen-purged and waterproof preserving the internal elements to 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. The waterproof eyepiece is easier to clean. The eyepiece features EMD (Enhanced Multilayer Deposition) Coatings.

Fabric:

  • Exotic Glass Combinations for Optimum Results Eyepieces are constructed of 8 or 9 lens elements that are fabricated from combinations of Dense Crown, Light Crown, Dense Flint and Lanthanum optical glass

Size and Dimensions:

  • Tapered 2" Barrel for Extra Security: The insert barrel of each eyepiece is double-tapered to allow smooth insertion to and removal from, a telescope's eyepiece holder or diagonal, however the wide dimension of the taper helps prevent the eyepiece from falling out of the telescope
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Barrel:Stainless-Steel, 2-inch, Double Taper, Accepts Standard 2-inch Filters
Coatings:All lens-to-air surfaces are fully multi-coated
Dimensions (L x W):156 x 70mm / 6.14 x 2.76"
Eyepiece Apparent FOV:100 Deg.
Eyepiece Eye Relief:14.5mm
Eyepiece Focal Length:20mm
Field Stop Dia.:34.8mm
Weight:38.1oz / 1080g

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