SPT - 1970

A collection of technical service notes published by the Society of Photo-Technologists (SPT) in 1970, serving as an essential workshop manual and repair reference for professional photographers and camera technicians. This comprehensive guide covers maintenance and disassembly procedures across multiple camera systems and accessories. The TOWER 20B shutter mechanism receives detailed treatment, with step-by-step instructions for field disassembly, frame counter access, film wind mechanics, and both M and X synchronization contact adjustment. The Nikkormat section provides practical guidance on film counter access, including precise procedures for removing the rewind lever and top cover assemblies without damage. A dedicated troubleshooting section addresses the Kalimar AM camera, documenting its automatic shutter cocking system, available shutter speeds from 1/25 to 1/200 seconds, and the dual exposure prevention mechanisms that protect against accidental double exposures. Additional technical notes cover complete disassembly of the Gossen Lunisix light meter with component-level detail, resolution of Mamiya C3 film counter malfunctions, and practical modification techniques for Nikkor lenses to accommodate accessory mounting brackets. Throughout the manual, experienced technicians have contributed field-tested procedures that balance mechanical accuracy with practical workshop considerations. Detailed mechanical diagrams and photographic documentation of critical assemblies support each procedure, while specific screw locations and safety warnings ensure confident execution of repairs and adjustments.