I'm in need of a lens that will shoot around 90 to 100 degrees. In 35mm equivalence, this would be about 16 to 18mm. The Panasonic 7-14mm zoom would be the obvious choice if it didn't cost close to $1,000. Is there anything in the adapted market that would reach these widths without terrible distortion? I can correct some distortion in Photoshop using Adaptive Wide Angle, but if I have to do big corrections, it would be just as easy to make the capture using my 12mm lens and shoot two shots as a panorama. I'm looking to avoid that level of post processing. Full manual controls is not a problem, I'd be using manual mode anyway.