The new 12mm lens is currently the widest t/2.9 lens that can cover sensor up to both full frame & vista vision size (wider than full frame), making it one of the ideal wide angle option for both professional cinema cameras and mirrorless cameras. The distortion rate of good wide angle lenses in the market ranges from 2-4%. Venus Optics, however, are able to compress the distortion to a close-to-zero level.