CANON - Canon EF 100 300mm f56L Parts

Complete parts catalog for Canon EF 100-300mm 1:5.6 (reference C21-9431) and EF 100-300mm 1:5.6L (reference C21-9432) lenses. This technical documentation provides comprehensive information for service technicians and specialists engaged in maintenance, repair, and restoration of these professional-grade optical systems. The catalog features detailed exploded-view diagrams illustrating the complete lens assembly with precise identification of each component. Technical schematics address all major subsystems: lens barrels, zoom and focus units, powered diaphragm mechanisms, autofocus systems, and control elements. An exhaustive parts list references over 150 components with Canon part numbers, classification categories (Classes A through E), required quantities, precise designations, and page references. Components are systematically organized by type: optical lens elements, rings, collars, barrels, focusing mechanisms, sealing elements, springs, specialized fasteners, and connectors. The documentation includes precision specifications for eccentric collars and other critical assemblies, lens element mounting schemes (G1 through G8), and electrical components encompassing cables and connectors. Two optical variants are comprehensively documented: the standard version and the premium L variant. Cross-sectional technical drawings provide complete understanding of both optical and mechanical architecture throughout the lens assembly.