Stars and the galaxy are things that attract photographers. After seeing a few pictures of star trailing photography, one of my friends fell in love with the beautiful circles the stars draws. And soon I found that it is actually really interesting.
Star trailing is basically shooting a picture with a very long exposure time at night. While the sky is being exposed, the earth will rotate but the stars will not. Therefore, the light of the stars are captured by the camera over time and the light will draw curly lines or semi-circles.
Creating star trail images is a fun technique that can occur a lot of different results depending on the shooting location, foreground objects and number of visible stars. While the technique can be simple, proper setup and then proper post-shooting preparations are very essential.
Shooting star trail pictures requires a camera with a tripod in order to make the lens steady. The camera should not move at all during the shooting process. Find north and aim the frame at that direction to get a centered and circle shaped star trail. Set the camera to a very low ISO and long a exposure time to shoot, and it works even better if the camera has a bulb mode.
Due to the length it requires to shoot the star trails, make sure there are not any moving objects around that may run into the frame, because they may mess up the whole picture. Control other light sources and be sure not to let any other light come into the frame except the stars. Set the focus to infinity so that star trails will be sharp and clear.
Charge the battery to full, then put on warm clothes and begin shooting tonight !!!