Binoculars: Quick Facts

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Photos

binoculars; horse racing

Diagram of prismatic binoculars with one side cut away to show internal components, including Porro prisms, objective lens, eyepiece, focusing thumbwheel, and the path of light rays through the device.

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stereoscopic microscope opera glass Telescope monocular optical system microscope eyeglasses periscope lens Mirror aberration diffraction grating filter refraction stereoscopy