CANON - Canon EF 28mm f18 USM Parts
by CANONComplete parts catalog for the Canon EF 28mm 1:1.8 USM lens (REF.NO. C21-5351). This technical reference document provides essential documentation for service technicians, repair specialists, and optical maintenance professionals. It delivers a comprehensive listing of all component assemblies, including commercial part numbers, classification categories, and required quantities. The catalog features detailed exploded-view diagrams illustrating the complete optical and mechanical architecture, with step-by-step disassembly and reassembly schematics. Key sections cover optical groups (CY1-2612, CY1-2634), autofocus mechanisms (YG2-0234), motorized diaphragm units (YG2-0235), and all precision assemblies including manual focus rings, guide barrels, and light-shielding elements. Detailed specification tables provide exact dimensional measurements and dimensional variants for critical components. This catalog enables precise component identification, sourcing of genuine replacement parts, and thorough understanding of the mechanical and optical structure of this premium standard prime lens.
Table of Contents:
- REF.No.C21-5351
- P a r t s l i s t
- Parts no.
- Class
- D e s c r i p t i o n
- Contact ass'y
- Screw, mount stopper
- Screw
- Pcb ass'y, m-flex
- Cy1-2178-000(xxx)
- Washer, mount
- Cy1-2180-000(xxx)
- Mount, lens
- RING ASS'Y, INDEX (Old)
- A/M SWITCH ASS'Y (Old)
- LENS ASS'Y, 1st GROUP
- Cover, back
- Ring unit, front
- Lens ass'y, rear
- A/M SWITCH ASS'Y (New)
- RING ASS'Y, INDEX (New)
- Screw, cross-recess
- Screw, cross-recess, ph
- Screw, cross-recess, ph
- Screw, cross-recess, ph
- Screw, cross-recess, ph
- Screw, cross-recess, ph
- Screw, cross-recess, ph
- Screw, cross-recess, ph
- Screw, cross-recess, ph
- Screw, cross-recess, ph
- Collar, assembly
- Barrel, guide
- Ring, manual focusing
- Ring, reinforcement
- Ya2-2238-000(xxx)
- Collar
- Scale, focusing
- Washer, light shield
- Ring ass'y
- Plate, reinforcement
- Collar
- Focusing unit
- Power diaphragm unit
- Pcb ass'y, main
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Document Details
- Format
- Pages
- 5
- Size
- 112.6 KB
- Category
- Photography