There is a very nice exhibit of Ansel Adams, Elliot Porter and William Clift on through Sept. 5th at the Art Institute of Chicago entitled "The Earth As It Was". It includes many classic prints and a few I have never seen before.
Also a show, "On the Scene" through 9/3 of very contemporary work by Kota Ezawa, Sarah Hobbs, and Angela Strassheim is worth seeing though not my cup of tea.
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