SONY - Sony STF 135mm f28 Service

Complete service manual for the Sony SAL135F28, a specialized STF 135mm f/2.8 (T4.5) lens for digital single-lens reflex cameras. This workshop manual delivers comprehensive maintenance and repair procedures essential for technicians servicing this premium optical instrument. The manual opens with detailed service notes covering chemical handling protocols, exterior component care, and lead-free soldering techniques, followed by a complete disassembly guide that walks through the entire optical mechanism step-by-step. Full technical specifications document the lens design including optical groups with apodization elements, 72mm filter diameter, physical dimensions, and weight. The parts list includes exploded diagrams for precise component identification across all internal assemblies and supplied accessories. Adjustment procedures address the critical operations you'll encounter in the field: aperture diameter verification and calibration, projective resolving power measurement, flange back distance (f'F) checking and adjustment, lens ROM verification, and focus brush position alignment. Safety protocols and detailed checklists accompany each procedure to maintain consistency and catch issues before the lens leaves the bench. The troubleshooting guide includes final safety checkout procedures that confirm repair quality and performance before customer handoff. An essential reference for optical technicians and professional camera repair specialists working with advanced lens systems.