| Birds | Common Nighthawk Chordeiles minor    Copyright David Seibel, 2009 (#1170) | Send Comment Camera: Canon EOS 40D Exposure: 1/800 sec, f/8.0, ISO 500 Lens: Canon 500mm f/4L IS + 1.4x II TC Date: July 18, 2009 Location: Kansas, USA Description: This is an HDR (High Dynamic Range) image combining three original exposures bracketed by +/- 2 EV to capture the full range of light and dark values. Birds don't often hold still long enough to allow this technique! The shutter speed given here is the median value.