Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Pentax LX is a 35 mm Single-lens reflex camera produced by Pentax in Japan between 1980 and 2001. The lens mount is the Pentax K mount, allowing the use of almost all Pentax 35 mm format lenses since 1975, excluding the early screw-mount lenses but which can be mounted using an adapter. It was the top-of-the-line "professional" camera in the Pentax manual focus range. Compared to contemporary professional bodies from most rival manufacturers, like the Canon F-1 or Nikon F3, the LX body was much smaller and lighter. The Olympus's OM-2, however, is lighter still (must be remarked that OM-2 had fixed viewfinder, while Canon, Nikon and Pentax ones were interchangeable).