How to do the trailing motion of star orbit in time-lapse photography?

1. There are more stars in the clear night sky.

2. Use tripod and cable to release, because it takes at least 20 minutes of exposure time, the hand pressure will shake and the duration will be short. The SLR battery must be fully charged.

3. Aim at the starry sky, and the aperture can be larger, such as F2-F4; It is best to put some scenery under the stars in the composition, such as mountains or lakes. But these landscapes can't shine, otherwise they will be overexposed. Focus clearly. A wide-angle lens is better.

4. Use the timing cable to release the exposure for more than 20 minutes. 20 minutes exposure can basically drag the star orbit out of the picture 1/5 or so. If it's longer, you can shoot it for 30 to 50 minutes.

If you want the stars in the picture to orbit around a circle, you have to photograph Polaris, and all the stars will revolve around Polaris. Remember, it's not the Big Dipper.

6. During the process, vibration and scattering of nearby light sources are strictly prohibited from entering the picture.