Question: What profession requires the artist to know about "F stops"?
Answer: Pet photography; Pet Photography; Photography as an art form; Photographing; Commercial photography; Photography; Fotografy; Art Photography; Print finishing; Commercial Photography; Photographic; Early photography; Photographic technique; Still photographers; Commercial photographer; Photography, History of; Photography techniques; Photography business; Photographics; Technology of Photography; Photo picture; Photo's; Yachting photography