... Sure nothing stands in the article description that here is a maßtreuen Gear ring for a follow focus, however, suggests the article image and the teeth of the gums that these could be handlen by such. Unfortunately this is not so, for two reasons: firstly, the rubber is so soft that the teeth of the Follow Focus teeth quasi wegschmiert and thus runs very inaccurate. In addition still comes that the teeth of the ring not to module 08 teeth fit and the translation runs thus very bumpy.
As a pure zoom / focus lever to DSLR optics, this product does quite well, the ring can be mounted in various voltages and thereby a certain "spring effect" achieved what can make the starting and stopping of zoom / focus individually.
Three stars only reason: because it is a blender and give FF is not capable.