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A borescope is a rigid tube with an eyepiece on one end and an imaging lens on the other. It is used for inspection work. It is similar to a fiberscope, but it is not flexible, and is therefore better suited to certain tasks such as gunsmithing. Like a fiberscope, it may be fitted with a magnifying device and a way to illuminate the work being inspected, and the eyepiece may be replaced by an imaging device such as a CCD camera.
Contrast fiberscope, endoscope