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Of course you can't think Yellowstone and photography without considering Ansel Adams. He wrote, in 'The Negative', that the haze penetration and bright foliage in an infrared image "does not necessarily achieve more than a superficially startling effect". He did take some infrared photographs, but I don't recall any of Yellowstone. Adams's comment on infrared photography may seem dismissive but he went on to "freely acknowledge that, in imaginative hands, infrared film can produce magnificent images." I think Simon's shots from Yellowstone fit that bill.