Mr. Keller a self-described “Flaneur, Rolleur” takes photographs from his wheelchair. “Mostly it’s New York, sometimes San Francisco. But the city can be any city. They’re all tricksters. I’m open to suggestions.”

The mysterious impressions captured from Mr. Keller’s “modest little digital camera” are single exposures “No multiple exposures. No photoshop.” He describes his photographs as “found art.” His eye is his mind is his hand as he responds with lightning speed to a particular coincidence of images. The potent little works, jewel-like in their clarity, draw the viewer into an illusory landscape, seemingly routine, but suddenly perplexing.