The Pentax SF-X is a camera model from the Japanese Pentax brand that was manufactured by the Asahi Optical Co., Ltd. (called PENTAX Corporation since 2002). It is also known as the Pentax SF-1 in the United States, and was first produced in 1987. It was Pentax's second Autofocus 35mm SLR after the Pentax ME F. It was the world's first AF SLR with built-in auto flash.
The SF-X comes from the same family as the slightly newer Pentax SF7/SF10.