Turbine engines are inspected by insertion of a zoom image or foveated image optical head through internal passages within the engine. The zoom image optical generates a first magnified image portion or a second image portion having a wider field of view and lower magnification. The foveated image optical head has a central first image portion having higher magnification that is included within and subtended by a second image portion having a wider field of view. The foveated or zoom image first and second image portions are separately simultaneously displayed on a common display, so that navigation position of the optical head and the magnified inspection image are correlated. In this way an inspector can confirm what area of interest within the turbine has been inspected while evaluating the adjacent magnified inspection image. The dual images correlation can be documented, such as by storing the simultaneously displayed images.