How to Capture Star Trails

Before you dig too far here, if you haven't read my first post sharing my tips on how to get started on shooting the stars, head over there if you'd like some quick, general information about night sky shooting.

You may have seen some of my images of the night sky where the stars look like huge circles or streaks across the frame. I'm going to show you two methods for achieving this effect and weigh in on what the pros and cons are of attempting one method over the other.

Mackinac Bridge, Michigan: One 4-hour exposure