FUJICA - Fujinon 28mm f35 Repair

Comprehensive repair manual for the Fujinon 3.5/28 mm ST801 lens, an essential technical resource for camera technicians and professional repair specialists. This detailed guide provides systematic procedures for complete disassembly, maintenance, and troubleshooting of this precision optical component. The manual is structured in five major sections. The disassembly section outlines the methodical removal of key components including the mount ring, aperture mechanism, and helicoid focusing system. The extensive repair and adjustment section covers focusing system alignment, helicoid operation, aperture mechanism maintenance with specific calibration procedures, restoration of oil-stuck aperture blades, aperture seat repair, and correction of mount ring levers. This section also addresses common issues such as deformed aperture selector rings and malfunctioning cam ring operations. The document provides specifications for the lens including f/3.5 aperture, 28 mm focal length, 75-degree angle of view, and 0.4 m to infinity focusing range. Additional sections include inspection protocols, a comprehensive parts list with component references, and identification of specialized repair tools required for maintenance work. The manual is presented in both English and Japanese languages, ensuring accessibility for service technicians worldwide and maintaining technical accuracy across different service regions.