How does follow focus work?

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Tags

1. #called
2. #precisely
3. #racking
4. #video
5. #focus
6. #pulling
7. #system
8. #using
9. #following
10. #action
11. #technique
12. #primary
13. #together
14. #conveniently
15. #function
16. #parts
17. #allow
18. #follow