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  1. C

    Screws/screwdriver for Canon EF 100-400 mm f/4.5-5.6 II lensmm

    For the lens referenced in subject line, I lost 2 screws for the silver lens mount (did not realize they were loose) . I ordered replacement screws. I know screws should ideally be tightened with JIS/crosscut screwdriver (rather than standard Phillips screwdriver) but I need to know what size...