CANON - canon lens 135
by CANONThis comprehensive service manual covers two professional Canon lenses: the EF135mm f/2.8 SF and EF300mm f/2.8L. The document provides detailed information on optical specifications, autofocus characteristics, and complete disassembly/reassembly procedures. The EF135mm section includes explanations of variable soft focus capability, optical design utilizing a molded spherical lens element, and specialized adjustments. The EF300mm, equipped with the advanced USM (UltraSonic Motor), receives extensive coverage including detailed operation of the innovative USM system, with comprehensive descriptions of piezoelectric vibration principles and power transmission mechanics. The manual presents complete optical schematics, element configuration diagrams, and comprehensive specification tables. Adjustment sections address focus calibration, pulse width adjustments for aperture control, and "Best Focus Adjustment" service procedures. Detailed electrical diagrams, PCB layouts, and schematic circuits are included to facilitate troubleshooting and repair. The guide contains precise instructions for AFD and EMD unit disassembly, along with recommendations for sealing and surface treatment. Essential technical documentation for Canon service technicians.
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Document Details
- Format
- Pages
- 57
- Size
- 12.0 MB
- Category
- Photography