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  • Stellarvue Optimus 20 mm 100 degree eyepiece

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

    $399.00
    (11 reviews) Write a Review
    SKU:
    EOP-20.0
    Width:
    10.00 (in)
    Height:
    6.00 (in)
    Depth:
    6.00 (in)
    SKU:
    EOP-20.0
    Barrel Size:
    2"
    Coating:
    Fully multi-coated
    Eyepiece Field of View - Apparent:
    100º
    Eyepiece Focal Length:
    20 mm
    Eyepiece Eye Relief:
    15 mm
    Eyepiece Series:
    Stellarvue Optimus
    Weight:
    29 Oz
    Length:
    6-1/4" long
    Diameter:
    3" maximum diameter
    Number of Lens Elements & Groups:
    9 elements, 6 groups
    Special Features:
    Weatherized. Outer lenses sealed.
    Comes with Dust Caps?:
    Yes
    Filter Thread?:
    Yes - for standard 2" eyepiece filters.
    Comes with Eye Guard?:
    Yes, foldable rubber eye guard.
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    Product Description

     

    ***Read the review of the Stellarvue Optimus eyepieces by Tony Hallas in the May 2017 issue of Astronomy***

    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 Weight Length* Max. Dia. Lenses** FOV*** Eye Relief Barrel(s) Field Stop Dia.
    20 mm   29 Oz 6" 2 5/8" 9/6 100 15 mm 2" 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

    Product Videos

    Custom Field

    SKU EOP-20.0
    Barrel Size 2"
    Coating Fully multi-coated
    Eyepiece Field of View - Apparent 100º
    Eyepiece Focal Length 20 mm
    Eyepiece Eye Relief 15 mm
    Eyepiece Series Stellarvue Optimus
    Weight 29 Oz
    Length 6-1/4" long
    Diameter 3" maximum diameter
    Number of Lens Elements & Groups 9 elements, 6 groups
    Special Features Weatherized. Outer lenses sealed.
    Comes with Dust Caps? Yes
    Filter Thread? Yes - for standard 2" eyepiece filters.
    Comes with Eye Guard? Yes, foldable rubber eye guard.

    Product Reviews

    Write a Review

    11 Reviews Hide Reviews Show Reviews

    • 5
      Great Eyepiece

      Posted by Juan Velasquez on 8th Aug 2018

      It's now the first eyepiece I pop in when observing. To be honest it I had to do it all over again, I would have purchased these instead of my Naglers. Don't get me wrong, the Naglers are fine but I love the 100 - 110 apparent fov. These are great for sketching at the eyepiece.

    • 5
      Best 20mm out there!

      Posted by Unknown on 4th Jun 2017

      I used the 20mm with my 14-inch dob for the All Arizona Messier Marathon and most of the Astronomical League's Sketching Program. What a beautiful image. Best low-power eyepiece I have in my case. All the rest are Ethos.

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