Beginner Nature Photography Walk with Jeff Linder – 10am-12pm. We’ll start by reviewing basic settings on cameras and learn how they affect different kinds of shooting. Then, we’ll head to a couple of spots in the refuge and practice before heading back to talk about post processing. John Heinz National Wildlife Refuge at Tinicum Pavillion, 8601 Lindbergh Blvd., Philadelphia. www.FWS.gov/refuge/john-heinz-tinicum.