CANON - Canon ef 28 80mm f28 4L Parts

Complete parts catalog for the Canon EF 28-80mm f/2.8-4.0L USM lens (reference C21-9482). This comprehensive service document presents the full optical assembly architecture through detailed exploded-view diagrams and a complete inventory of every component in the system. The technical breakdowns span the entire lens construction: front and rear barrels, lens groups (G1, G2, G3/G4, G5), focus and aperture mechanisms, zoom systems, coupling rings, retaining collars, dust shields, flex circuits, and all mounting hardware. Every part carries its specific reference number and classification code for precise identification. A detailed parts list cross-references all components with quantities, descriptions, and page numbers, letting you locate exactly what you need. The catalog covers optical elements, mechanical assemblies (rings, collars, shields), electrical components (coils, resistors, DC/DC converters), and fastening hardware (screws and washers in various grades). An essential reference for optical repair technicians, lens restoration specialists, and Canon camera equipment maintenance professionals who need authoritative technical documentation for service and rebuild work.