Excerpt: I bought this lens because it claimed to be rectilinear. Well, sort of. But in fact, the distortion is so complex that I can come up with no way to correct it. I have found no profiles available for Adobe Camera Raw or Lightroom. Notice in the image that I'm uploading, how the horizon is nowhere near flat. It bulges up in the middle, then down towards the sides, and then up again at the very edges.