GE Rigid Borescopes feature precision lenses, prisms and cover-glasses that deliver bright, clear images. The use of a special penta-prism at the tip ensures correct image orientation without the need for a compensating doveprism. 

Special attention to maximizing light transmission in the optical path results in increased image brightness, and the on-axis resolution at the image center is held as high as possible towards the edge of the field of view. This uniform, flat field makes the smallest defects visible, and greatly reduces user eyestrain.