How do I operate the FocusONE? Ashley July 26, 2018 20:29 Follow Please check out our User's Manual video below to learn how to operate your focusONE! Related articles How do I fine-tune the Focus Module? Do I need batteries for the Focus Module? My Focus Module skips teeth and does not stop at macro or infinity. What can I do? How do I attach the Focus Module? Why is there play on the knob of my FocusONE? Is something wrong? Comments 0 comments Please sign in to leave a comment.