Here is another image from my weeklong trip around the National Parks. This one was taken in Zion National Park on the not-so-popular west side of the park at a place called Kolob Canyons.

This image is another example of imaging during twilight. The foreground was captured during nautical twilight while most of the sky was captured at the end of astronomical twilight/beginning of night.

Location: Kolob Canyons, Zion National Park, UT
Date: 2011-07-03
Camera: Canon XSi (modified)
Lens: Sigma 20mm f/1.8
Mount: Still Tripod, Astrotrac
Landscape: 17x20 seconds f/4 ISO 400 (Mosaic)
Sky: 26x120 seconds f/4 ISO 1600 (Mosaic)
Processing: Photoshop, Topaz DeNoise 5