cameras; operating laboratory and darkroom equipment for film and print production; mixing and quality control of photographic chemicals and solutions; preparation of audiovisual productions; operating video and electronic imaging equipment; photographing and writing articles for publication; providing photographic documentation for criminal and safety investigations. .Specialties: The duties performed by PHs include:• operation and maintenance of various types of still and video cameras; • performing duties as members of flight crews; • operating laboratory and darkroom equipment for film and print production; • solutions mixing and quality control of photographic chemicals and ; • preparation of audiovisual productions; • video and electronic imaging equipment; • photographing and writing articles for publication; criminal and safety investigations. .