Explore Scientific

EPWP8218-01

Explore Scientific 18mm 82° 2-inch O.D. Argon-Purged Waterproof Eyepiece

The 18mm 82° Series Waterproof Argon-Purged Eyepiece is a popular focal length in the upper-medium power magnification class providing both super-wide apparent field and generous eye relief.

It's perfect for any application where more power is desired including observing globular star clusters, planetary nebulae, the bright cloud structure near the nucleus of comets, initial observations of planets, and (with the proper safe filtration on your telescope), observations of active regions of the sun.

Features:
  • EMD anti-reflective multi-coatings ensure bright, high-contrast images with true color transmission across the entire wide field of view.
  • The fold-down rubber eyecup prevents stray light from leaking into the eye, further boosting contrast.
  • The eyepiece is internally sealed and purged with inert, dry argon gas, which maximizes the life of its internal coatings.
  • Ideal for planetary and deep-space observations.
  • The eyepiece is tested by submerging it down to 1 meter of water for 30 minutes.
  • Fully multi-coated and edge-blackened to produce maximum contrast.
Specs
Focal length 18mm
Length 89mm
Width 56mm
Weight 390g; 13.7 oz.
Barrel Size/Type 2.00"
Eye Relief 13mm
Field Stop Diameter 25.3mm