Our new single sided follow focus is built to attach directly to a 15mm lightweight rod and has a gear ratio of 1:1. The Zip Focus pivots and adjusts to fit any lens, and utilizes a minimal amount of space. The included .8 mod cine lens gear and friction gear can be flipped to the front or back position which is helpful for compact lens configurations. The hard stop disc can be used with DSLR lenses with infinite focus rotation and two standard marking discs are included for cine lenses. The rubberized focus knob is textured for a sure grip. At the center of the knob is an ARRI-standard accessory port for attaching separately available accessories such as a whip or a crank.Users of photography lenses will appreciate the inclusion of a friction drive gear in addition to the 0.8 MOD drive gear for controlling lenses that don't have gearing. Gears can be secured to either side of the follow focus, providing flexibility in positioning where the follow focus can be tightened down, relative to other rig components. Please note that the Zip Focus is geared for standard rotation and is not reversible, as some might prefer for Nikon Primes, etc. Included Items:1x Hard Stop Disk, 2x Marking Disks, 1x Friction Gear and 1x .8 Mod 35 Tooth SPECIFICATIONS:Weight: 352 g (0.78 lbs), Dimensions: 101.6 x 88.9 x 127 mm ( 4 x 3.5 x 5 in)