Range
binoculars capable of measuring a distance between the observation place and an object, the
binoculars being made small-sized with keeping the functions as
binoculars. The range binoculars includes first and second optical systems, each with an
eyepiece optical member, an objective lens optical member, and an erecting
prism consisting of a first
prism and a second
prism, wherein the first optical
system has a first
optical axis parallel with a second
optical axis of the second optical
system; first and second
beam splitters, each with a beam-splitting face, wherein the first
beam splitter is disposed between the first prism and the second prism of the first optical
system, and the second
beam splitter is disposed between the first prism and the second prism of the second optical system; an emitter for emitting a
laser beam toward an object via the first
beam splitter; a
photodetector for receiving the
laser beam which was emitted by the emitter, reflected by the object, and comes to the
photodetector via the second beam splitter; a
calculator for determining a distance from an observation place to the object using a
flight time of the
laser beam taken from the emitter to the
photodetector; a measurement result display for displaying the distance determined by the
calculator; and a casing accommodating the first and second optical systems, the first and second
beam splitters, the emitter, the photodetector, the
calculator, and the measurement result display.