I really have in general a problem using dslr lenses with a follow focus rigg using 2 hard stop ends. With the GH4 lens 14-140 its obvious. This lens focus cannot be fixed on a hard stop if you are using this hard stop back and forth repeaditly - means the lens is loosing the exact focus point when going to the hard stop. This is why absolutely cine lens are working much better in such a config. Does anyone has similar experiences or workarounds with it?