Ultrafine’s rigid boroscopes employ lens systems instead of a fibre bundle for relaying an image to the eye, or to a camera to produce perfectly clear pictures.  Latest designs have up to 370° rotation, and special ‘swing prism’ versions allow adjustable direction of view from forward to retro angles.  Small instruments allow effective inspection of boreholes, castings and engine components, whilst larger versions are invaluable for inspection of large tanks and vessels.