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This is a Stellarvue Optimus 20mm eyepiece with a ONE HUNDRED DEGREE apparent field of view. It is in excellent condition, with completely clean optics and unmarked barrel.
This came in (with a bunch of ES 100-degree eyepieces) from one of our trusted long-time customers, who keeps his gear in perfect, clean condition. This one is no exception. It is in its original box with both dust caps, and velvet bag.
Features
Introducing the Stellarvue Optimus eyepiece series. This 20 mm eyepiece is ideal for viewing of extended objects, scanning the Milky Way and locating objects using the widest possible field of view.
A 100-degree field of view provides the user with almost 1.5 times the area of an 82-degree eyepiece. When using hand driven alt-azimuth mounts this generous field will be appreciated. The eyepiece offers a generous 15 mm of eye relief and has a standard foldable rubber eye cup. Each of the nine elements are fully multi-coated, edge blackened and the lens barrel and baffles are similarly dark black. All of these factors add up to create an extremely contrasty eyepiece that is free of unwanted reflections, flaring or ghosting.
Our EOP eyepieces are now loaded into AstronomyTools database and application. Click here to simulate the field of view https://astronomy.tools/
| 20 mm Stellarvue Optimus Specifications | ||||||||
| Focal Length: 20 mm Weight: 29 oz Length: 6" Max Dia: 2-5/8" Lenses: 9/6" FOV: 100 degree Eye Relief: 15 mm Barrel(s): 2" Field Stop Dia: 34.9 mm |
- Measured with eye cup rolled down. Add 1/8" if rolled up.
- Number of elements/number of groups
- Apparent Field of View measured in degrees