Last week I decided to head to The Headlands. Since I got there several hours before dark I spent the time in Mackinaw City, and by extension, the Bridge.
One of the issues with digital camera is dust. If you look at these images, you can see the dark, slightly grey-black spots in the sky. This is a result of dust. No matter how hard you try, you're going to end up with dust in your images at some point if you switch lenses.