Anyone interested in astrophotography should look elsewhere. At f/1.4, there are too many optical errors. Something happens from f/2.8 onwards. To achieve a good result, you may need to change lenses multiple times. I don't know if things have improved with the new Samyang lens series.

Amazing lens, but only for close-up photos. As you can see in the picture, from 1 meter and beyond, you have a very small margin of focus, and since there is no autofocus, it is very difficult to focus.

One of the best lenses for landscape and astrophotography!
With an aperture of 1.4, it 'sees' everything in low light.
Amazing sharpness, very good color reproduction, sturdy and high-quality feel.