CANON - Canon EF 100 400mm f45 56L IS USM Parts

Complete parts catalog for the Canon EF 100-400mm 1:4.5-5.6L IS USM lens (reference C21-9961). This technical resource provides a comprehensive listing of all components and assemblies with detailed exploded-view diagrams and precise part identification. The catalog features five pages of technical illustrations documenting the progressive disassembly of the lens, including the front optical group (1st group), focusing elements, intermediate optical groups (3rd, 4th, 5th and 6th groups), and image stabilization (IS) systems. Every component is identified with its unique part number for straightforward identification and ordering. The parts list encompasses over 100 references organized by category (collars, screws, springs, barrels, rings, sensors, flat cables, housings and assembled units). Critical dimensions with precise tolerances are provided for essential elements. Both old and new variants are documented, including the tripod socket units (YG9-0263-000 vs YG9-0263-100) and drive bands (CY1-2483-000 vs CY1-2857-000). This documentation is essential for repair technicians, restoration specialists and optical professionals requiring detailed component information.