SONY - Sony STF 135mm f28 Service

Complete service manual for the Sony SAL135F28, a specialized STF 135mm f/2.8 (T4.5) lens designed for digital single-lens reflex cameras. This technical reference provides comprehensive maintenance and repair procedures for this premium optical instrument. The manual encompasses detailed service notes addressing chemical handling, exterior components, and lead-free soldering techniques, complemented by a thorough disassembly guide covering the complete optical mechanism. Full technical specifications are presented, documenting lens groups (6-8 elements with apodization), filter diameter (72mm), physical dimensions and weight specifications. The repair parts section features comprehensive exploded views enabling precise identification of every component and included accessory. Adjustment procedures address critical operations including 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. Each section incorporates safety protocols, comprehensive checklists, and precise specifications to ensure optimal performance following service. The document provides safety checkout procedures to verify repair quality before customer release. Essential reference material for optical technicians and professional camera repair specialists working with advanced lens systems.