Yongnuo yn adatper EF E II firmware

Firmware history

1. Version 08 Latest First seen Jul 11, 2026
   Show release notes Hide release notes

   V08 2022/3/29

   1. Improved 7M4 phase detection auto focus compatibility
   2. Other optimizations

   V07 2021/12/14

   1. Improving compatibility.
   2. Adding more lens compatibility.

   V06_beta6 2021/3/6

   1. Improving compatibility.
   2. Adding more lens compatibility.

   V06 2020/11/06

   1. Improve the stability of individual cameras.

   V05 2020/08/21

   1. Adding more lens compatibility.

   yn_ef2fe_r05T17N_beta3 2020/03/31

   1. Adding more lens compatibility.
   2. ​Improved aperture stability.

   yn_ef2fe_r05T17K_beta 2019/10/24

   1. Improving compatibility.
   2. Adding more lens compatibility.

   yn_ef2fe_r05T17I_beta 2019/09/12

   1. Improving compatibility.
   2. Adding more lens compatibility.

   V04 2019-05-20

   1. Added the Fn custom function settings.

   You can use the camera's [Focus Hold but​ton] custom settings menu to set the Fn custom function of the adapter ring.

   After saving the settings, you can use it.

   This function requires the camera to support using the [Focus Hold Button] to customize the settings.

   For details, please refer to the camera manual.

   Properly setting the FN custom buttons can reduce operations and increase efficiency.

   2. Improved the lenses compatibility.
   3. Optimized the focus performance.

   V03 2019/04/30

   1. Improved the lenses compatibility.
   2. Optimized the focus performance.

   V02 2019/04/13

   1. Improve communication stability.
   Release notes & download