What is the use of m-fn keys?

The function of the m-fn key is "auto focus area selection mode". You can use this function to obtain the correct flash exposure for a specific part of the subject; how to use it is: 1. Aim at the center of the viewfinder to cover the subject. Subject; 2. Press the camera's "M-Fn" button and take a photo.

#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

What are the m-fn keys used for?

The "m-fn" key on Canon 5d3 is the autofocus area selection mode.

1. You can use this function to get the correct flash exposure for a specific part of the subject.

2. Aim at the subject covered in the center of the viewfinder, then press the camera's "M-Fn" button and take the photo.

Instructions for using each button:

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