There is nothing subtle about the effect this filter produces. Rather than creating a motion blur that trails from one side, it pinches the center of the frame from both sides or, depending on how you rotate it, from the top and the bottom. It can make framing your subject a bit challenging as the portion of the frame untouched by the effect is smaller than when using a similar but unilateral motion filter. That said, negotiating what is a problem for some people is a creative opportunity for others—an opportunity this filter does not fail to deliver. Even if it does nothing more than help break the habit of someone who by default puts their subject in the center of the frame, so much the better. With so many elements put into motion by rotating this filter I can see how it might be useful for video, allowing viewers to see how the effect develops rather than viewing it as a completed still image. It’s nicely made, the 58mm filter weighing nearly two ounces. The multicoated optical glass rotates smoothly, exuding strength and clarity. Included are three, quality microfiber cleaning cloths and a hinged, padded plastic case.