A night sky trail time-lapse is made from hundreds of long exposures taken back to back, then joined into a clip or stacked into one image. The short version: use a sturdy tripod, a wide lens, a dark location and a fixed interval between frames, then let the camera run for an hour or more.

Night Sky Trail Time-Lapse: How to Shoot It, Beginning to End

Plan the Shoot

Good results begin before you leave home. Check the moon phase and choose a night when the moon is absent or low, because moonlight washes out faint detail. Pick a spot away from town lights, with an interesting foreground such as a tree, a ridge or a building.

Decide which part of the sky to face. Pointing toward the celestial pole makes circular trails, while facing east or west makes diagonal streaks. A weather app with cloud cover forecasts helps you avoid wasted nights.

Gear You Will Need

  • A camera with manual mode and a wide, fast lens
  • A sturdy tripod that does not drift when the wind rises
  • An intervalometer, either built in or external, to fire frames automatically
  • Spare batteries and a memory card with plenty of free space
  • A red-light headlamp so you keep your night vision

Step-by-Step Shooting

  1. Set up the tripod on firm ground and level the camera. Frame your foreground and the sky together.
  2. Switch to manual mode, manual focus and RAW. Turn off image stabilization and long exposure noise reduction.
  3. Focus on a bright point of light using live view at high magnification, then leave the ring alone.
  4. Try an aperture near the widest setting, an ISO of roughly 1600 to 3200, and an exposure of 20 to 30 seconds. These are opening values, so adjust after a test frame.
  5. Set the intervalometer for a gap of about one second between frames, so trails look continuous rather than dotted.
  6. Begin the sequence and let it run for at least 60 to 90 minutes. Longer runs give longer trails.

Build the Final Result

For a still image, load all frames into stacking software that uses a lighten blend, which keeps the brightest pixel from each frame. For a moving clip, import the frames as an image sequence in a video editor and set a playback rate of around 24 frames per second. You can also build a growing-trail effect by stacking progressively more frames for each output frame.

Edit one frame first in your raw editor, then apply the same adjustments to the rest so the look stays consistent.

FAQ

How many frames do I need?

For a clip of around ten seconds at 24 frames per second you need roughly 240 frames. At 30 seconds each, that is about two hours of shooting, so plan battery and storage accordingly.

Why do my trails look broken into dashes?

Gaps between exposures cause this. Keep the interval to a second or two, and make sure the camera finishes writing each file before the next frame begins.

The Short Version

Choose a dark, moonless night, lock focus on a bright point, and fire 20 to 30 second frames with a short interval for an hour or more. Stack the frames for a still, or play them as a sequence for a clip. Treat every setting here as a baseline and adjust to your conditions.