For high-speed variant lenses, look no further than the Ironglass Mk2 Soviet lens set used in Dune: Part 2, Creator and Batman. This improved set offers rarer, faster application optics than the standard set, with up to one stop more light transmission at key focal lengths, adding even more options and features to the already excellent standard set. The Ironglass set is sharp in the center with a gradual falloff of focus at the edges. It offers dreamy flare, swirling bokeh and a very pleasing balance of contrast and sharpness.