Just a quick star trails shot I did last night...well, if you can call 43 minutes quick. This is 103 exposures of 25 seconds each put together with StarStax to create this image from Saguaro National Park east in Tucson. I used my Canon 60D and Tokina 11-16mm f/2.8 lens at 11mm and f/2.8. I wanted the saguaros in the foreground. I didn't center on polaris since the farther west I pointed, the more the lights of Tucson interfered. Hope you like it.
Reprinted with permission from the Half-Astrophysicist Blog.