The ultimate impact of cellphones on the art of photography is likely to be enormous, but the full effect hasn’t been sorted out yet. A 50-image exhibit of cellphone photography at the PhotoWorks gallery in Glen Echo Park sketches out a few of the more intriguing directions. Some of the participating artists offer traditional approaches—-Victoria Pickering’s image of pedestrians dwarfed by a rigidly lined crosswalk, or Blake Stenning’s vertiginous photograph from inside the Leo Villareal-lit tunnel in the National Gallery of Art – while others push the envelope, often using filtering and modifying software. Ironically, for such a cutting-edge medium, some of the most striking images look resolutely backward in photographic history for inspiration: Val Makepeace’s birds and bikes in a painterly beige field; Rhonda Harris Baines’ heron in a romantic, blue-green, landscape;  Kristy Hofkens’ bridge in Budapest, shown in a murky black-and-white that suggests an 18th-century salted-paper print; and Victoria Porter’s brilliantly orange-hued cityscape (above) that, oddly enough given its color palette, shows Seattle.

Through Sept. 4 at PhotoWorks, 7300 MacArthur Blvd., Glen Echo, Md. Open 1 to 8 pm on Mondays and Sundays, 1-4 on Saturdays, and any time when a class is underway. That includes most evenings, and many Saturdays and weekdays. To check call 301-634-2274.