Tuesday, August 23, 2011
Solutions: How To Shoot Star Trails
Follow these tips and tricks for shooting in the dark
We’ve seen a number of outstanding star trail images in the OP Assignments galleries, contest entries and other direct submissions to the magazine. Many of the photos are excellent. The cover image for this issue, photographed by Jeffrey Sullivan, is an example of a brilliantly executed star trail image. Some of the others we’ve seen motivated us to do this short step-by-step Solutions article to explain how to do it right.
Sullivan’s cover image is particularly unique because he has used moonlight to illuminate Yosemite Valley. Many star trail shots show a very dark foreground. By contrast, Sullivan’s shows a brightly lit foreground that has a surreal quality by virtue of the fact that it was lit by moonlight with a long camera exposure. You don’t have to use moonlight, of course, but if you have the chance, the effect can be startling.
Location, Location, Location
The first step is to come up with a place where you can get a good composition. Whether you’re shooting by moonlight or on a very dark night, the foreground elements do matter. You want to create a pleasing composition. A lot of photographers will choose something very close and light it with a flashlight during the exposure to add an element of interest. Whether you do that or not, you still want to have a good horizon line. Jagged mountains or a perfectly flat ocean can work, but think it through, and when you review the image on the LCD, be sure to evaluate the horizon critically.
There’s no law saying your star trails have to orbit around a single point, but for your first attempts, we recommend that you point your camera generally north. You don’t need to center the North Star (Polaris) in the frame, but it’s a good idea to have it near the midline of the frame. This is a general rule, and like all rules, it’s made to be broken after you’ve built up some experience.
Lock Everything Down
Nothing could be more obvious. You’re going to have a very long exposure, so you need to lock down the camera with a sturdy tripod and a good head. Positive locking is key. If the camera starts slipping during the exposure, the results will be unacceptable.
If you’re shooting a scene like the one on the cover, just focus at infinity. We suggest you use manual focus mode to keep the camera from trying to hunt. If you’re shooting with something close to the camera, you need to focus carefully to be sure everything from your near object to infinity is sharp.
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