1.Compatible for and other DSLR Camera Camcorder DV Video Fits industry standard 15mm rod mounts and 60mm center to center distance 2.It can be easy to mount and take down Using drive can adjust camera focus in a more accurate and smooth way. 3.Its ring belt is suitable for less than 100mm diameters lens. 4.Non-slip design with grooved knob The white mark ring is made of plastic and it can be used to mark the scale on follow focus. 5.It is great for follow focus . Product Type: Follow Focus Application: Lens smaller than 85mm aperture Maximum load: 2-5 kg Product weight: 0.2 (KG) size:17.5x12.5x8CM Material:Aluminum alloy colour: Yellow and Black Package Contents: 1 x Follow Focus 1 x Follow focus ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.