During a recent trip to Grand Canyon North Rim, our group stayed in
Kaibab Lodge, which is 5-mile away from North Rim. The elevation of that
location is about 8840 feet. In addition, there is no light pollution in the
mountain. Moreover, the dry climate of Arizona reduces visual distortion.
What more can you ask for? This is the ideal site for astro-photography. The
location is perfect, but my equipment is not the best. Usually star
photographers lock the shutter for a very long exposure in order to record
the star trail. I have a cable release to lock the shutter, but I don't have
anything to secure the tripod. It was too cold for me to stay outside for
hours, and as a compromise, each of the preceding pictures was exposed for 5
minutes only.