The 523PRO remote control works with both Sony and Canon LANC-enabled video cameras. The remote control features a record/stop button, a power on/standby button, three different zoom speed control buttons (slow, medium and fast) and a push auto focus button. The zoom wheel can be used to control one of the three preset, maximum zoom speeds or a customisable maximum speed which you can set to exactly the level you want. For all zoom speeds except the slowest preset speed, you can choose between progressive zoom speed (the further you rotate the zoom wheel, the faster the zoom) or fixed zoom speed (irrespective of the rotation applied to the wheel, zoom speed remains constant) by pressing the button once (progressive) or twice (fixed). The LED shows you which speed you have selected. To set a “custom” zoom speed, simply hold the zoom speed button until the LED flashes and use the wheel to set your speed. The setting remains in the unit’s memory until you decide to change it. Whether you choose a limited progressive zoom range or a single fixed speed, the features of the 523PRO mean you can easily repeat zooms precisely in subsequent takes of the same shot. The 523PRO also allows you to set left- and right-handed operation by changing zoom wheel direction. The push auto focus button makes it very easy to achieve in focus images when working in manual focus mode. You can also use the manual focus in and out buttons and change the focus direction. 523PRO does not come with any parts to fit to the head, but instead utilizes the pan bar clamp that comes with all Manfrotto heads.