This image of star trails is a Photoshop combination of 24 three minute exposures. I used one of the standing stones at The Sanctuary, Avebury as the foreground interest along with the car light trails. If you look to the left of the stone, you can see my car, where I sat shivering, reading a magazine while the exposures clicked away for over an hour!
Canon EOS 1Dx
24 x 3 mins, ISO400, f6.3