How to avoid extreme highlights from reflecting surfaces

Optimize your illumination system. Extremely applicable in case of image documentation by a digital camera.

Reflected light is polarized light. This physical property is known by everybody who is doing serious photographies with a single lens reflex camera.

Motif: Landscapes, technical buildings, any kind of documentation for newspaper or book.
Solution: A rotatable polarization filter mounted in front of the objective.

Polarization filter of a reflex camera (source)

Rotate the filter until contrast is maximum, reflections are minimum. A new viewing angle requires a new adjustment.

Picture taken with Pol-Filter, interior visible vs Picture taken without Pol-Filter (source)