ef20mm usm autofocus problem

  1. SteveL
    Thread

    EF 20mm f2.8 USM autofocus issue

    Hi I've just gotten hold of a EF 20mm f2.8mm with USM autofocus. Its has a a strange problem that I've never come across before. When focussing...
    Thread by: SteveL, Aug 2, 2019, 5 replies, in forum: Technical Troubleshooting
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