Orion 20mm Expanse Eyepiece

Retail Price: $73.00
You save: $5.01  (7%)
Our Price: $67.99

Orion 20mm Expanse Eyepiece

-This 20mm eyepiece offers a wide field of view and superior optical performance at a bargain price.
-Great eye relief so eyeglass wearers can view the entire field without removing their glasses.
-Delivers sharp images with good color correction and contrast.
-Aluminum barrel is internally blackened to eliminate internal light scattering.
-One-year limited warranty

With their 66 degree apparent field of view, the Expanse wide-field eyepieces will definitely turn up the Wow! factor in your deep-sky observing experiences! Imagine taking in objects like the Andromeda Galaxy, the Double Cluster, or the star clouds in Sagittarius in one sweep! With an Expanse in your focuser, you can!

Expanse oculars have big eye lenses and great eye relief (13mm to 17mm). Eyeglass wearers can view the entire field without removing their glasses. All eyepiece elements are fully coated, with the outer lens multi-coated for additional light transmission. Each 1.25" aluminum barrel is threaded for filters and internally blackened to eliminate internal scattering. And their fold-down rubber eyeguards enhance contrast by blocking stray light.

Eyepiece focal length: 20.0mm
Barrel size: 1.25"
Apparent field of view: 66.0-deg
Eye relief: 18.0mm
Coatings: Multi-coated
Number of elements: 4
Filter threads: Yes
Parfocal: No
Field stop diameter: 23.5mm
Barrel security recess: Yes
Blackened lens edges: Yes
Rubber eyeguards: Yes
Body material: Aluminum
Weight: (oz.) 3.81
Dimensions: 2.3 in. x 1.3 in.
Warranty One Year

Add to Cart:

  • Model: 08923
  • Shipping Weight: 1lbs
  • Manufactured by: Orion

This product was added to our catalog on Friday 18 January, 2008.