JMI RB-66 reverse binoculars

These impressive binoculars provide brilliant, wide-field views of celestial objects.
By | Published: May 19, 2009 | Last updated on May 18, 2023
JMI RB-66 reverse binoculars
THE JMI RB-66 reverse binoculars may be the dream of many observers.
Astronomy: William Zuback

This review, “JMI’s RB-66 binoscope,” appeared in the February 2004 issue of Astronomy magazine.

Mention binoculars, and most of us envision a pair of small prismatic refracting telescopes joined together by a central spine. Their small size and light weight make binoculars perfect for an impromptu viewing session — whether a distant scene, a bird in flight, or a look at the night sky.

Of course, not all binoculars are small and light. Some are large and heavy. Despite their differences in size, however, all binoculars have the same basic design. Until now.

A new concept
Late in 2002, Jim’s Mobile, Inc., (JMI) introduced an innovative product called the RB-66 binoscope. The “RB” stands for “Reverse Binoculars,” something the amateur market hadn’t seen. The RB-66 is, in effect, two 6-inch f/5 Newtonian reflectors with a protective “clamshell” of molded plastic surrounding the entire assembly.

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