“Encounters” showcases the Sheldon Museum of Art’s superlative photography collection, focusing on American transnationalism and highlighting the artistic, cultural, geographic, scientific, and technological conflicts and concurrences that shaped the modern photographic image. The exhibition features new acquisitions, rarely-seen treasures, and recognized masterpieces by Berenice Abbott, Manuel Alvarez Bravo, Gertrude Käsebeir, Andre Kertész, Robert Mapplethorpe, and Carrie Mae Weems, among others.