Photography, starry sky

First of all, the location is not selected, you can see the telephone pole, and it is very close to the famous red light near the ground, indicating that there are relatively strong personnel activities around.

Secondly, the aperture of 22 is too small, so it is recommended to open it to a gear below the maximum aperture (for example, if I am 24- 105 f4, I will open it to 5.6, but it is not impossible to maximize it directly).

Then focus can't see clearly, but it is recommended not to aim at infinity completely. If you don't focus completely, the star image will be enlarged, but it will look good, and you can also add a filter.

If exposed for another 30 seconds, the star image will be obviously elongated after being enlarged (star orbit). If you don't like it, you can reduce the exposure time, but don't play without enlarging it.