D|Focus Systems 006 D Zoom Manual Zoom Lever (Black) Single rail, all aluminum, CNC machined 15mm rod mount Smooth, damped motion (amount of damping is user adjustable) Industry standard 32 pitch (0.8 mod) drive gears. Works with D|Gears as well as any other standard lens gear or Cine lens. All stainless steel fasteners End user adjustable backlash