I exposed for over three hours to create this image busy with aircraft traffic.
Date: January 29, 2009
Location: Death Valley National Park, CA
Optics: Canon EF 17-40mm f/4L USM used at 17mm
Camera: Canon 20Da on Tripod
Exposures: 204 JPEG light frames of 1 minute at ISO 1600
Process: Multiple images stacked with Photoshop.