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.