FEMALE RUBY-THROATED HUMMINGBIRD, GREEN, MICHIGAN, AUGUST 16, 2013
Pentax F* 300mm f4.5
1/8000 sec. f7.1
It's not easy to stop a hummingbird's wings in a photograph, but I set the aperture at f7.1 and put the ISO on 1600 so that the camera would take a properly exposed picture at its maximum shutter speed, 1/8000th of a second. The picture was snapped just as the bird's wings stopped on the upstroke.