Borescope

A borescope comprising:

• a plurality of bending parts with predetermined bend angles;
• a plurality of lens barrels which are connected via and between respective ones of the plurality of bending parts;
• a plurality of joint parts via which rotation angles of the plurality of bending parts is changeable relative to the plurality of lens barrels, each of the plurality of joint parts having a lock ring disposed around an outer circumference of one of the plurality of lens barrels and configured to be selectively tightened to apply a frictional force and loosened to relieve the frictional force by rotating the lock ring relative to one of the plurality of lens barrels thereby moving the lock ring between a tightened position adjacent to one of the plurality of bending parts and a loosened position spaced from the one of the plurality of bending parts;
• an objective lens device which has an objective lens and is detachably provided at a front end side of the plurality of lens barrels;
• a plurality of reflectors respectively disposed in the plurality of bending parts;
• a plurality of relay lenses respectively disposed in the plurality of lens barrels;
• and
• a camera mount provided at a rear end side of the plurality of lens barrels.