FUJICA - Fujinon 28mm f35 Repair

Comprehensive repair manual for the Fujinon 3.5/28 mm ST801 lens, an essential workshop reference for camera technicians and professional repair specialists. This detailed service guide provides systematic procedures for complete disassembly, maintenance, and troubleshooting of this precision optical component. Organized in five major sections, the manual opens with methodical disassembly instructions covering removal of the mount ring, aperture mechanism, and helicoid focusing system. The extensive repair and adjustment section forms the heart of the document, addressing focusing system alignment, helicoid operation, and aperture mechanism maintenance with specific calibration procedures. You'll find detailed guidance on restoring oil-stuck aperture blades, repairing the aperture seat, and correcting mount ring levers—all common issues requiring precision work. The manual also tackles deformed aperture selector rings and malfunctioning cam ring operations with step-by-step correction methods. Technical specifications detail the lens's f/3.5 aperture, 28 mm focal length, 75-degree angle of view, and 0.4 m to infinity focusing range. Additional sections provide thorough inspection protocols, a comprehensive parts list with component references, and identification of the specialized repair tools required for competent maintenance work. Presented in both English and Japanese, this workshop manual ensures technical accuracy and accessibility for service technicians across all regions.