The Contax RTS is a professional-level 35mm SLR film camera that was introduced by Contax in 1975. It is part of the renowned Contax RTS series and was produced by Yashica under licence from Zeiss. The first RTS (short for Real Time System) was designed by Prof. Dr. Katsuiko Sugaya, styled by the Porsche Design studio, and manufactured by Yashica as Top Secret Project 130.