The SnapFocus allows filmmakers to pull focus and steady the camera on the move, making it easier to achieve Hollywood production value on a shoestring budget. With a simple lever and cable system, the SnapFocus is really easy to use. Simply pull the lever on one side and your lens spins to infinity (focuses the lens far away). Pull the other lever and it spins to macro (focuses the lens close up). It’s an intuitive way to control the focus on your camera and since you don’t have to keep spinning and spinning a focus wheel, you can literally “snap” the focus into place or use it for smooth, continuous focus and turn your DSLR into an ENG rig.