I am looking to buy a lens for wide angle astrophotography in the next month or two. I am currently looking at the Rokinon 24mm 1.4 due to its stellar reviews and price, but Sigma is coming to market with their 24mm 1.4 Art. I am shooting on FX and want a wide angle lens to capture the Milky Way. The Rokinon is manual focus only, which is absolutely no issue at night in this intended use. That does have its limitations in other uses. The Sigma looks interesting, and supposedly by design should be excellent. In hindsight I wish I'd bought the 14-24 2.8 vs the 16-35 f4, but overall I still love the 16-35. The Nikon 20mm 1.8 is interesting and gives me slightly wider angle than I already have with my 24-70 2.8.
I'm sure there are others on this forum shooting wide angle Milky Way. What are you using and why? I need to stay under $900. Anyone shot with the Rokinon 14mm?