After been very disappointed with the Samyang 24mm f1.8 lenses i have now moved onto the Sony 24mm F1.4 GM lens.
While this lens doesn't have an astro setting for focusing you have to selecting a star and then zoom in to obtain the focus.
I had to wait sometime for a clear sky before trying it out, wow the sharpness is incredible even at F1.4, and wide open lets more light in than the Samyang
I tried it out on our cats at F1.4 & a Sony A7iii and was blown away with the quality.
I have bought this for both Astro photography and landscape photograph. I like working with wide angle lenses although it needs a different approach. You also need to obtain a good focus with the very narrow depth of field