Not hard to learn back button focus, it has been said before, just set up the cfn then stick with it for a week, after that you will probably know if you get on with it or not. I found it was best to use single shot with beep on until you program the brain to BBF no beep you forgot to focus. Also be aware that you can trip the shutter whilst OOF with BBF.
A technique advice would actually to get a compass in you eye.
Not litterally but I strongly advocate learning to
- read/evaluate the distance between you and subjects
- know what distance you need for full body, torso, shoulder and head portrait
- know the DoF at the widest aperture for those situations
This is mainly for prime work but my output and keeper rate improved greatly with that.
Also I was a strong Av advocate but forcing myself to go full M (not focus, I'm not masochistic) improved creativity in the shoots but voluntarly over/under exposing some shoots or some boring part of the frame.
Next for me to learn is BBF.
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