Foton F-Ring FRG14 Focusing Lever 3.15 -3.35 inch

F-Ring is a simple, but innovative solution to improving your work in manual focus or zoom mode.
The easy to attach lever lets you adjust focus or zoom, in a precise way and assists with smooth and gentle transitions.
F-Ring was primarily designed to be helpful when filming with DSLR cameras but it also works with many camcorder models as well.
The practical design of F-Ring makes it easy to mount and remove. Two levers are provided, short and long to match your working style.
Please refer to fitting information below, to ensure you order the correct diameter F-Ring for your lens:
Fitting information.
Important: The F-Ring size refers to lens diameter, not to filter size. Decide if you want the F-Ring for the focus or zoom ring on your lens. Measure the diameter of the lens at the point you wish to fit the F-Ring.