Do you use 24gm or 20g for astronomical shooting?

1 and 24GM have a focal length of 24mm, while 20G has a focal length of 20 mm ... When shooting the starry sky, the shorter the focal length, the wider the shooting angle and the more star fields the picture contains. That is to say, 20G is more suitable for shooting the vast starry sky.

The weight of 2.24GM is about 580g, and that of 20G is about 300g. In long-term outdoor shooting, a lightweight lens can reduce the burden on photographers and make it easier to carry and operate.