| Birds | Great Gray Owl Strix nebulosa    Copyright David Seibel, 2013 (#6568) | Send Comment Camera: Canon EOS-1D Mark IV Exposure: 1/640 sec, f/5.6, ISO 2000 Lens: Canon 500mm f/4L IS + 1.4x II TC Date: March 10, 2013 Location: Duluth, Minnesota, USA