SPT - Mamiya 500TL

Technical service publication issued by the Society of Photo-Technologists in November-December 1973, dedicated to the maintenance and repair of the Mamiya Sekor 500TL camera. This comprehensive article by Leland R. Bartel outlines detailed disassembly procedures, operational theory, and reassembly techniques for this single-lens reflex camera with interchangeable lenses. The guide provides thorough analysis of the camera body components, particularly those located on the bottom plate, including the wind lever mechanism, diaphragm-meter switch system, spring assemblies, and shutter-curtain tension adjustments. The guide features annotated technical diagrams identifying each internal component and their relationships. A dedicated section addresses common failure modes specific to this model, particularly exposure meter switch malfunctions, with practical troubleshooting and repair solutions. Additional content includes supplementary service notes, reader correspondence, professional listings, and information about camera repair training courses. Applicable to the entire 500 and 1000-TL series, this issue of the SPT technical journal serves as an essential reference for technicians and service professionals specializing in Mamiya camera repairs and maintenance during the 1970s era.