Alex Corrigan


First Star Trail Photo Attempt

Pointing my camera to the night sky

I was inspired to get some photos of the ISS traveling across the night sky during the past month, but was a bit out of practice with my camera. So to get in training I attempted to capture a long exposure star trail photo. Capturing the stars (or rather the Earth) rotating about the pole.

The following photo was the result of about an hour long exposure, but in reality a composite of many shorter exposures.

  • Camera = Canon EOS 7D
  • Lens = Canon EF 17-40mm f/4L USM
  • Focal Length = 23mm
  • Aperture = f/4.5
  • Exposure time = 14s
  • ISO = 800
  • No. Exposures ~ 200

stars

See the source photo here

I used Gimp to composite all the individual images, manually! It took ages. I will be looking for a more automated approach to this!