Kamera-Werkstätten Guthe & Thorsch was established 1919 in Dresden by Paul Guthe and Benno Thorsch, starting out manufacturing the Patent Etui plate camera. Ten years later came the roll film TLR Pilo

The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means t