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Stellarvue 20 mm Optimus 100 Degree Eyepiece - 2" - EOP-20.0

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Stellarvue 20 mm Optimus 2" Eyepiece

With a focal length of 20 mm, this Stellarvue Optimus will serve you well when observing larger deep-sky objects, scanning the Milky Way for treasures, or locating objects using the widest possible field of view. Since a 100-degree eyepiece has almost 1.5X the area of a wide angle 82-degree model, the celestial object of your choice will stay in the field of view longer. This is especially nice for those with alt-azimuth mounts and telescopes without tracking!

The Stellarvue 20 mm Optimus eyepiece consists of 9 lens elements in 6 groups. Each lens is fully multi-coated and their edges are blackened to stop internal reflections. There are also black baffles inside the eyepiece that reduce reflections, and to top it off, the interior of the lens barrels are painted black. All of these precautions result in an eyepiece that is free of ghosting, flaring, or unwanted reflections, giving you a beautiful, high contrast view of our Universe.

While not waterproof, all Optimus eyepieces are weatherized and the outer lenses are sealed. A rubberized grip helps you handle this eyepiece safely, even with gloves on, and the rubber eye guard folds down for those who wear glasses while viewing. The Optimus 20 mm model is a straight 2" eyepiece, designed to fit 2" focusers, adapters, or diagonals.

Stellarvue 20 mm Optimus Eyepiece Specifications

  • Focal Length: 20 mm
  • Barrel Size: 2"
  • Apparent Field of View: 100 Degrees
  • Eye Relief: 15 mm
  • Lens Elements: 9
  • Lens Element Groups: 6
  • Coatings: Fully Multi-Coated
  • Filter Threads: Yes
  • Eye Cup: Rubber, foldable
  • Weight: 29 ounces