Back button focussing allows the focus feature to be taken off the picture taking button and allocated to another button.
https://www.youtube.com/watch?v=0Suk5FORNL8&feature=youtu.be&t=10
Back button focussing allows the focus feature to be taken off the picture taking button and allocated to another button.
https://www.youtube.com/watch?v=0Suk5FORNL8&feature=youtu.be&t=10
