CANON - Canon EF24mmf28 EF100 200mm f45 Service

Comprehensive service manual covering two professional Canon lens models: the EF24mm f/2.8 and EF100-200mm f/4.5A. Designed for authorized service technicians and repair specialists, this technical reference provides complete maintenance and repair procedures. The introduction section details optical characteristics, including focal length, aperture specifications, autofocus system design, and optical performance features unique to each lens. The disassembly and assembly section offers detailed step-by-step instructions for component removal and reinstallation, including front lens units, EMD and AFD drive units, and focusing helicoid mechanisms. The adjustments chapter covers essential procedures such as S-distance calibration (optical element spacing), optical tilt correction for resolution optimization, focus adjustment, and pulse calibration protocols. A comprehensive "Best Focus Adjustment" service policy addresses discrepancies between autofocus positioning and actual optimal focus points. The document includes parts lists with material specifications, color coding reference for electrical schematics, and complete electrical diagrams illustrating circuits, connections, and detailed configurations for both lens models. Full technical specifications and testing procedures ensure professional-level maintenance standards and performance verification.