If you want the smooth adjustments for video, they've made it easier for you. Some of the newer Samyangs come in two models, priced the same. One without clicks for video work, and one with clicks. I'm assuming for non-video work the only reason you'd want the clicks because shutter speed and ISO are 1/3 or 1/2 stop based, and the clicks help ensure you're not at an adjustment that can't be balanced by adjusting one of the other settings. Personally I'd think it more advantageous to be able to control the DOF finely than to worry about over/under exposure by 1/6th of a stop on average.