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William Optics 20mm 66-deg Wide Angle Binoviewer Eyepiece

4.0 (1 Reviews) Read Reviews Write Review
Brand William Optics
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Product Info


1.25" 20mm 66-deg eyepiece included with William Optics binoviewers. Not sold separately.


4.0 (Based on 1 Reviews) 100% of reviewers recommended this product.
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    1. viperbob

      viperbob New Member

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      Feb 20, 2009

      4.0 William Optics 20mm 66 deg Wide Angle Binoviewer Eyepiece


      Included with the binoviewer at cost; Very good light-weight eyepieces.


      To some,66 degree AFOV would be kind of small.


      I bought a Williams Optics Binoviewer over the winter and they came with a pair of WO 20mm eyepieces. These are not the same as the WO Swan 20mm eyepieces though.

      They are made to be used with the WO binoviewer and are very good wide-view eyepieces. They have an AFOV of 66 degrees and are black metal with the multi-grip around the eyepiece. Views are just great out to about 90% of the viewing area while Lunar viewing, and show no ghosting at all in viewing the very bright moon. All glass is fully multi-coated and has a very nice green tint. They come with the binoviewer with both caps but no boxes.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No
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