I have an old Olympus keymed borescope, bought it off a bloke who had worked in the repair dept there. Probably came out as reject parts one piece at a time! It has a base unit with 8ft fibreoptic cable to the viewing handle & eyepiece 8mm rod with right angle view, cracking piece of kit that has been used on engines, houses & boats.
Dont use it often but when you need it you need it!
Dont use it often but when you need it you need it!