The street in the foreground was painted with an LED flashlight for several seconds during the exposure. The star trails are dimmer due to the smaller aperture, the fact that the moon was still in the sky, and light pollution from the city in the distance, seen as the glow to the right. Exposure time was 30 minutes, ISO 100, f/5.6. This image was created as a single exposure. The image below was a 30 minute exposure. The longer the exposure, the longer the trails. Once you’ve set your aperture, you need to decide how long a star trail you want. If you are photographing in a completely dark setting, with no moonlight, the stars will likely be the brightest object in your scene. The wider the aperture is open, the brighter the star trails will be. You’ll want to set your aperture somewhere around f/4.
A time controller such as the Nikon MC-36A, or Canon TC-80N3 can make things easier by allowing you to lock the shutter button down, or program a set amount of time for the exposure. It is like manual mode, but the shutter stays open for as long as the release button is depressed. Some cameras have a separate mode for Bulb. When using the single exposure method, your camera needs to be in manual mode, with the shutter speed set to Bulb. This method was the only way to photograph star trails in the days before digital cameras. The first is the old-fashioned way, using a single exposure.įor this method, exposures can range anywhere from several minutes, to several hours. There are two ways to photograph star trails.
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