The Zip Focus Single-Rod Follow Focus (15mm LWS) secures to a camera rig on a single 15mm LWS rod, a short-bodied design built for compact camera setups. A central joint pivots to fit a wide range of lenses, driven through a 1:1 gear ratio on 0.8 MOD friction drive gears. It ships with 2 standard marking disks for logging focus points, plus a hard-stop disk for DSLR lenses. The focus gearing runs in the standard rotation direction only and is not reversible, which is worth checking against Nikon prime lenses and similar setups that turn the opposite way.