Art Reactor Gallery is a new artist-run photo-focused gallery/workshop/studio space in Hyattsville presents its first curated exhibit. The Whole Plate Project focuses on photographs made using a variety of historic and contemporary materials but all in the “whole plate format,” defined as 6.5 inches by 8.5 inches and first used by Louis Daguerre in 1839. Scott Davis, Quinn Jacobson, Chris Rini, Heather Wetzell and Barry Schmetter are among the featured artists. Now to Sept. 10. Art Reactor, 5614 Baltimore Ave. Hyattsville, Md. Visit artreactor.org.