One of my students was complaining about how jerky the zoom looked, on the school's Canon T7i and 18-135 lens. For video I can see that most zooms are just not up to the task of smooth zooming for video. The zoom ring on some are so stiff that I have to grip the zoom ring with my hand and use my arm to turn the zoom ring. How the heck do the lens manufacturers expect people to use the zoom for video? It seems practical only to zoom between video shoots, and only shoot video WITHOUT zooming. Anyone have any tricks to make zooming smoother, so the kids can zoom while shooting video?