20mm 100° Series Nitrogen-Purged Waterproof Eyepiece

20mm 100° Series Nitrogen-Purged Waterproof Eyepiece
Sale price good through Feb 28, 2010!
These 20mm eyepieces have a 100° Apparent Field Of View and the body of the eyepiece 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, 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 the eyepiece is tested in one meter of water for 30 minutes. The eyepiece features EMD™ (Enhanced Multilayer Deposition) Coatings.

Focal Length: 20mm
AFOV: 100 degrees
Eye Relief: 14.5mm
Nitrogen-Purged and Waterproof: Submersible to 1 meter for 30 minutes; Internally sealed and purged with inert, dry nitrogen gas to prevent internal fogging
Body: Anodized Black Aluminum;
Laser-Etched Description and Serial Number; Rubber Grip:
Internally O-Ring Sealed
Barrel: Stainless-Steel, 2-inch, Double Taper, Accepts Standard 2-inch Filters
Coatings: All lens-to-air surfaces are fully multi-coated
Eyecups: Soft rubber folding style; Replaceable

All Explore Scientific telescope accessories are covered under our standard U.S.A. One Year Limited Warranty against defects with proof of purchase, but you can extend this limited warranty to five years by simply filling out the product registration and submit it to Explore Scientific within 60 days. This program is also available to the person who receives your gift of an Explore Scientific telescope. You don't need to give them the purchase receipt, just remind them to fill out the registration and submit it to Explore Scientific and we will take care of the rest.