First of all make your life easier rent this lens for easy doc and run and gun shooting don't be worried about the speed this lens takes fantastic images with 0 focus breathing. SERVO Lens combines the functionality of Canon's EF lenses with the features and performance of their CN-E lineup. Designed for use with EF-mount cameras featuring Super 35 or APS-C sized sensors, the lens covers an incredibly useful 18 to 80mm focal range while maintaining a constant T-stop of T4.4 (f/4) throughout. Measuring 7.2" long and weighing only 2.65 lb, the lens presents itself as a compact, lightweight option suitable for a variety of productions, from narrative work to run-and-gun documentaries. Notably, the lens is Canon's first cine-style option to incorporate image stabilization and auto focus functionality when paired with Cinema EOS cameras. Rental comes with the optional ZSG-C10 Control Grip for ENG-style lens control and operation. Power is provided to the grip from compatible cameras via the EF mount. For non-servo zoom control, the lens features cine-standard 0.8 mod gears, as well as a rubberized grip on the focus ring enabling comfortable manual operation.