We are the Authorized Service center for Linhof in the USA. Bob trained at the factory in Germany on the LinhofTechnika models, including the process of making custom lens rangefinder cams. We stock all of the available blank cams from the factory for 4x5 cameras. All 5x7 cams have been discontinued by the factory, but we have a few left in stock. For those 5x7 cams that we don't have, we manufacture our own beautiful copies.