Yongnuo YN50mm F1.4C firmware

Firmware history

1. Version 1.09 Latest First seen Jul 11, 2026
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   V1.09 2020/8/6

   1. Improve stability

   V​1.08 2020/4/3 Fix the err problem when using F1.6 aperture in TV mode

   V1.06 2018/12/27

   1. Repair the problem that 7D II camera can't focus automatically
   2. Other improvements

   V1.05 2018/12/11

   1. Repair the problem that EOS M6 camera can't focus automatically
   2. Other improvements

   V1.04 2018/10/13

   1. Optimizing the stability of video recording

   V1.03 2018/6/27

   1. Optimize AF Performance
   2. Fix the i​naccurate exposure, when the lens is used on the 80D/6D II camera
   3. Other improvements

   V1.01 2018/6/22

   1. Improve the compatibility of SLR camera;
   2. Improve the compatibility of eos-m camera;
   3. Fix some camera focus less problem;
   4. Other improvements.
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