Special Features:

Tube length is 435mm; eyecup is 32mm diameter, rotate to focus; eyecup and focusing ring aree aluminum, black anodized; front window is ar coated optical glass; tube is 304 stainless steel; all other machined stainless steel is 303; temp range -20 to +120 degrees c

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.