Special Features:

20.241 in. Dia; 11.000 in. Working length; 90 degrees vertical direction of view; 50 degrees field of view; rigid; fiberoptic light guide system c/o objective lens, relay lens, eyepiece lens; rotary scan 260 deg.; diopter correction; depth focus control

Properties:

A viewing device used to visually inspect items such as cannon bores, internal combustion engine cylinder walls, propellant perforations of rocket motors or similar items, for defects of manufacture, corrosion, scars, erosion, etc., without the necessity of disassembling the item(s). It may or may not have extension tubes to cover the various ranges of inspection. The item is basically a straight-tube telescope using a mirror or prism.