Skip to content

UPS Shipping Delays / COVID-19 Response Statement

Explore Scientific 9 mm 100° Argon-Purged Waterproof 2" Eyepiece - EPWP1009-01

shipping truck Free shipping
SKU: EXS-EPWP1009-01

Explore Scientific 9 mm - 100° Argon-Purged Waterproof 2" Eyepiece

These eyepieces are the world's first argon-purged waterproof eyepiece with a 100 degree Apparent Field for astronomy. The body of the eyepiece is argon-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.


  • Focal Length - 9 mm

  • AFOV - 100 degrees

  • Eye Relief - 14.5 mm

  • Argon-Purged and Waterproof: Submersible to 1 meter for 30 minutes; Internally sealed and purged with inert, dry nitrogen gas to prevent internal fogging

  • Coatings - All lens-to-air surfaces are fully multi-coated

  • Eyecups - Soft rubber folding style; Replaceable

  • Weight - 21.2 ounces

All Explore Scientific telescope accessories are covered under their 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 they will take care of the rest.