This compact follow focus system enables you to control the focus with more precision. Made from machined aluminum and other high-tech materials, it attaches directly to the 15mm light-weight support with a quick-lock clamp. Compact and affordable enough to use on DV cameras, yet professional enough to use on high end cameras. This follow focus is up to the level of the most demanding camera operator. The rotation lock is specially for DV cameras with an indefinite rotating focus ring, the Manual Focus Controller Kit features a "rotation stop." This stop can be enabled or disabled, providing a hard stop on the focus knob.