The Sevenoak follow focus SK-F02 is completely gear-driven design for slip-free, accurate, and repeatable focus movement. It is compatible with most DSLR cameras or video cameras. It features three sizes of gear rings and each gear ring has an adjustable tension so you can tame those loose focus rings for different lenses. The entire setup can be mounted either to the left or right of a lens depending on your needs/preference. The gear box is reversible, so you can have the wheel spin whichever direction you prefer for pulling focus. And the adjustable slide-mounting system can be mounted onto any standard 15mm Rod Support.\n\nFeatures\n- Completely gear driven design for slip-free, accurate and repeatable focus movement.\n- Adjustable slide-mounting system.\n- Mounts onto any 15mm Rod Support.\n- Can be mounted either to the left or right of a lens.\n- Reversible gear box .\n- Compatible with most DSLR cameras, video cameras.\n- Include three sizes of gear rings for different lenses.