Special Features:

Rigid; retrospective view 110.0 deg; working lg 9.4 in; probe diameter 0.197 in.; focus 0.0 to infinity; mag 1; 1 at 1.180 in. And 2.6: 1 at 0.390 in. Working dist; field of view 42.0 to 48.0 deg; steel, stainless, type 304 insertable portion; fiberoptic illumination; op temp m20.0 to 80.0 degrees c; w/case

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.