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Orion - 20mm Illuminated Centering Eyepiece

Model#: 08239

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Availability: In stock In Stock


In Stock

Manufactured by: Orion

Orion - 20mm Illuminated Centering Eyepiece


Orion 20mm Illuminated Centering Eyepiece

  • The perfect eyepiece for alignment of GoTo systems
  • An invaluable aid to centering guide stars and/or astro-imaging target objects
  • Illuminated crosshair precisely centered in eyepiece field of view for accurate results
  • Wide 70-deg apparent field of view makes acquiring and centering target objects a breeze
  • Comfortable 16mm eye relief
  • A welcome addition to any astronomers accessory case

You'll never be left in the dark with the Orion 20mm Illuminated Centering Eyepiece (ICE). Whether you're acquiring and centerign stars for GoTo system alignment, lining up guide stars and/or target objects for astro-imaging, or just testing the accuracy of your tracking system, the ICE will quickly become one of your most trusted and useful imaging tools.

In comparison to most standard low-focal length illuminated reticle eyepieces, the ICE offers a relatively long 20mm focal lenght and a wide 70-degree apparent field-of-view, making it easier to locate desirable targets for alignment or guiding. This virtually eliminates the need for swapping out high-power illuminated reticles with lower power eyepieces in order to center objects.

The Illuminated Centering Eyepiece is fully multi-coated (all air-to-glass surfaces) with anti-reflection coatings for bright, crisp views. It features a great 16mm eye relief and the barrel is threaded for Orion 1.25" filters. The illuminator switch doubles as a "dimmer" allowing you to adjust cross-hair brightness to the desired level.

The illuminator is powered by two LR-44 batteries (included) and weighs in at 8 oz. One-year limited warranty.

Product Specifications:

Design Proprietary
Eyepiece focal length 20.0mm
Barrel size 1.25"
Apparent field of view 70.0-deg
Eye relief 16.0mm
Coatings Fully Multi-coated
Number of elements 5
Filter threads Yes
Parfocal Yes
Field stop diameter 25.0mm
Barrel security recess No
Blackened lens edges Yes
Rubber eyeguards Yes
Body material Aluminum
Weight (oz.) 7.50
Warranty One year







Additional Information

Name Orion - 20mm Illuminated Centering Eyepiece
Manufacturer Orion
Model 08239
Custom Stock Status In Stock
Eyepiece Apparent FOV 70
Eyepiece Apparent FOV2 0
Eyepiece Barrel Size 1.25"
Eyepiece Eye Relief 16
Eyepiece Eye Relief 2 0
Eyepiece Field Stop 25.0
Eyepiece Focal Length 22.0
Eyepiece Focal Length2 0.0
Eyepiece Elements 5