They may be small business owners. They advertise their services, schedule appointments, as well as set and adjust equipment. After the pictures are taken, portrait photographers develop and touch up negatives. They may mount and frame pictures. They also hire and train employees, buy supplies, keep records, and bill customers.
Commercial photographers take pictures of products, buildings, landscapes, and other topics.
Industrial photographers use photographs or videotapes for publicity or studying engineering projects. They also may use them as records of equipment development. This photography is often done on location. Scientific photographers do illustrations for scientific publications. They usually specialize in a field, such as biology or medicine.