Buy on Amazon : http://www.amazon.com/gp/product/B00AJ0IPLC?tag=lottalatte-20 <br /> <br />Opteka CXS-800 Gearless Follow Focus System for DSLR Cameras (Fits 15mm Rods/Rigs)) <br /> <br />Gearless follow focus is adjustable for most lenses and adds a sleek look <br />Attaches to any rigrail system with the industry standard 15mm rods <br />Includes speed crank <br />1 Year warranty
