Explore Scientific


Explore Scientific 120° 9mm 2-inch O.D. Argon-Purged Waterproof Eyepiece

The Explore Scientific 9mm 120° Series eyepiece really is in a class by itself, because the 120° apparent field of view is unlike anything you have experienced before.

Normally, when you look through hyper wide field eyepieces, you see a huge swath of the night sky at low magnification, but with the 9mm 120°, you'll be able to see nebulae, galaxies, or star clusters, close up and personal.

  • Great for viewing celestial objects by using averted vision
  • 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.
  • 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.
Focal length 9mm
Length 145mm
Width 60mm
Weight 602g; 21.2 oz.
Barrel Size/Type 2.00"
Eye Relief 12.5mm
Field Stop Diameter 15.7mm