STEP BY STEP: Get in a spin
Here’s how to shoot circular star trails
1 Fr ame and focus
If you’re shooting in the northern hemisphere, point your camera at the North Star if you want to capture circular star trails. In the southern hemisphere you will need to locate the Southern Cross. The easiest way to compose and focus is to set a very high ISO and switch to Live View.
2 Set the EXPOSURE
Once you’re happy with the framing of your shot, you will need to drop the ISO back down to 400, and set Manual exposure mode. Choose a shutter speed of 30 seconds and an aperture of f/5.6, and take a test shot to check that the stars are visible. If they’re not, increase the ISO until you can just see the stars.
3 Shoot your SEQUE NCE
If you’re using a remote release, set the camera to continuous shooting, then press and lock the remote. With an intervalometer, set the interval to 30 seconds. Finally, shoot a dark frame with the same settings.
A wide-angle zoom like this Sigma 10-20mm is ideal for star trail exposures