Denkmeier II Powerswitch Binoviewer

Say "goodbye" to eye fatigue by adding Denkmeier's Binoviewer to your observing kit.
By | Published: May 19, 2009 | Last updated on May 18, 2023
Denkmeier II Powerswitch Binoviewer
The Denkmeier II Binoviewer lets you keep both eyes open when using your telescope and minimizes eye fatigue. With the Power x option (shown), you can select from three different focal ratios, effectively tripling your eyepieces.
Astronomy: William Zuback

This review, “Eyes wide open,” appeared in the January 2006 issue of Astronomy magazine

Most observers find binoculars easier to use than a telescope. Enter the binoviewer, an accessory with an internal prism that sends light to two eyepieces, letting your telescope mimic binoculars. When I unpacked the Denkmeier II Powerswitch Binoviewer, I thought, “If this thing matches the way it looks and feels, Denkmeier Optical has a real winner.” When I looked through the binoviewer, my thought changed to “Oh, wow!”

I pointed my Schmidt-Cassegrain telescope (SCT) at the First Quarter Moon. I quickly called my wife and a couple of neighbors over to enjoy the view. All concurred with my “wow” assessment. I then spent the next few hours enjoying the most spectacular views of the Moon, Jupiter, and Saturn I have ever seen through this scope. And all without the “face-muscle fatigue” that plagues every astronomer who has spent serious time at an eyepiece.

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