I tried this lens on a 5D Mk3 at CP+. I'm not familiar with the other lenses in the Art lineup, but the focus ring felt a bit rough to me...not the kind I would want to use to pull focus when shooting video. Takes beautiful, sharp pictures though, and is a welcome alternative to the more pricey Canon 24mm L. In terms of video, though, the cheaper Rokinon still takes the cake for me.