BRONICA - Bronica ETR 40mm 50mm 150mm Repair

Comprehensive technical documentation covering the Zenzanon lens range for the BRONICA ETR system at focal lengths of 40mm, 50mm, and 150mm. This manual provides detailed parts lists with complete reference numbers for each lens configuration, enabling accurate identification and sourcing of replacement components. The document features detailed exploded views illustrating the complete assembly of each lens, with precise numbering of all optical elements (lenses G-1 through G-8), diaphragm mechanisms, shutters, and retention systems. Comprehensive tables enumerate technical specifications, required quantities, and commercial part numbers to facilitate maintenance and restoration operations. For the 40mm F4 lens, the manual includes a detailed step-by-step procedure for replacing the Zenzanon shutter unit, accompanied by exploded diagrams showing both disassembly and reassembly sequences. The 150mm F4 procedure similarly provides comprehensive protocols for shutter replacement with precise positioning of electrical and mechanical components. This reference work serves as an essential resource for workshop technicians, restoration specialists, and medium-format photography enthusiasts seeking to maintain or repair BRONICA ETR lenses. The clearly annotated technical diagrams and exhaustive parts nomenclature enable rapid component location and provide complete understanding of these professional-grade lens structures, making it indispensable for anyone performing maintenance, repair, or restoration work on BRONICA equipment.