The RF85mm F1.4 L Vcm is a unique L-series lens for both still-image and video enthusiasts. It boasts a medium-telephoto focal length, a blazing fast f/1.4 maximum aperture, and top-notch optical design. On a full-frame camera, it offers one of the most common focal lengths for portraits, a timeless choice. The video side really shines with a dedicated manual iris ring and a silent Vcm (Voice Coil Motor) for smooth focus. And guess what? Focus breathing is minimal on this versatile lens.Incredible feature set from an incredible lensThis lens has a lot going for it. You already know about the new Vcm and Iris control ring, but there is so much more. You can attach filters to this lens with a front 67mm screw thread allows for screw-on filters. You also have a control ring and a control button both of which you can assign functions to. This lens is also dust and weather resistant, has one aspheric lenses, and Asc (Air Sphere Coating) to reduce ghosting.