Sigma 24mm 1.4 Art vs Samyang 24mm 1.4
Well, you're going to be focusing manually (at infinity) for astrophotography, so if that's your primary intent, don't spend money on a feature you won't use.
The Sigma is clearly better here:
but I'm buying the Samyang anyways since it's a third of the price.
|My Garden by Mitchmeister|
from The Secret Garden
|Crowded Skies by Rushlin|
from Seven types of aircraft - lighter than air