Zeiss just announced their own Lens Gear Rings for the Zeiss Milvus, Loxia and Otus lenses, making them automatically compatible with follow focus systems for video work. The new Zeiss Lens Gear Rings is made out of premium aluminium with a hardened surface coating that easily slips onto the lens' focus ring.
Canon just announced the CN-E18-80mm T4.4 L IS KAS S - an affordable lightweight Cine Zoom with an Optional Servo Unit for video professionals and enthusiasts on a budget. The new lightweight servo zoom complements the existing CN7x17 and CN20x50 cine zoom, but at a much more affordable price point.