DESC: The Mamiya RB67 Pro SD camera is the latest development in the enduring RB67 series. This new version features a larger lens mount opening and still accepts all previous RB67 lenses. However, older RB lenses will require Lens Mount Adapter Ring #301245 for a proper fit. The new lens mount allows the use of two new lenses: The KL75mm f/4.5 Shift and the KL 500mm f/6 super telephoto. Mamiya introduced a series of high performance lenses for the RB67 Pro SD designated with a KL prefix. All new KL lenses will work on the previous RB67 models with the exception of the 75mm Shift and the 500mm f/6