Thank you! A very bizarre lens combo. A Nikon 105mm f/2.8 macro lens, which will not even reach focus on the Oly EM5 somehow comes alive when a 20mm Kenko macro extension tube is added. It focuses at about 28 inches and has roughly an inch DOF at f/2.8. So... a little wildflower one inch across will be in focus front to back without stopping down.