Check out my in-depth review and comparison of the F&V MG-3 Follow Focus compared to the O'Connor Dual Mini, ARRI MFF-2 and the Manfrotto Sympla MVA511FF follow focus. Plus reasons to use a follow focus.

Specs and Prices:
F&V MG-3: http://www.fvlighting.ca
O'Connor Dual Mini: http://bhpho.to/1p1ov0p
Manfrotto Sympla MVA511FF: http://bhpho.to/1QZ0r4P
ARRI MFF-2: http://bit.ly/1ROxsE1