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Stellarvue 9 mm Optimus 100 Degree Eyepiece - 1.25"/2" - EOP-09.0

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We are no longer carrying this Stellarvue eyepiece. Here is a link to other 8 mm to 10 mm Wide Angle Eyepieces. If you'd like some advice on choosing the best eyepieces for your applications, don't hesitate to contact one of our non-commissioned product advisors. We are here to help!

Stellarvue 9 mm Optimus 1.25" Eyepiece with 2" Adapter

The Stellarvue Optimus 9 mm eyepiece was designed for those who want a quality medium power eyepiece and an amazingly wide field of view at the same time! With a focal length of 9 mm, this Stellarvue Optimus would work well for observing the moon and planets as well as deep-sky observations. 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 9 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 9 mm comes with a removable 2" adapter that reveals a 1.25" barrel, allowing you to use it in both 1.25" or 2" focusers or diagonals.

Stellarvue 9 mm Optimus Eyepiece Specifications

  • Focal Length: 9 mm
  • Barrel Size: 1.25" with 2" Adapter
  • Apparent Field of View: 100 Degrees
  • Eye Relief: 15 mm
  • Lens Elements: 9
  • Lens Element Groups: 6
  • Coatings: Fully Multi-Coated
  • Filter Threads: Yes; standard filter threads on both 1.25" and 2" barrel
  • Eye Cup: Rubber, foldable
  • Weight: 19 ounces at 1.25", 23 ounces at 2"