I don't do astrophotography but want to, and if the lens is good enough (doesn't have to be stellar) this lens would be perfect for me (assuming it is reasonably priced).
Well, that was my main reason for looking forward to this lens. But judging from this review, it's not the best choice for astro. That vignetting is simply massive. Both Oly and Pana 7-14 as well as Oly 9-18 all loose significantly less light. So yeah, with vignetting like that, this f/2 looses a lot of it's charm.
Yep, right on. That's a bummer. I was hoping the Laowa would be a great lens for astro.
Now, I am left a little bit clueless. I wanted to buy the Panny 7-14 f4 for wide angle (landscape) shooting and the Laowa for astro.
The Olympus 7-14 f2.8 isn't a good alternative either. I consider f2.8 too slow for m43 astrophotography. My D800 + 14mm f2.8 beats my GH4 + Oly 8 f1.8 hands down.
Still, I prefer the GH4 combo because of the lighter weight. Not a fan of the fisheye look, though. So, the Oly 7-14 could be a (rather poor) option. But with the upcoming GH5 the weight advantage has been obliterated. If it would not be for the far superior video features (at least on paper), I would move to a Sony + wide angle combo:
GH5 + Oly 7-14: 1.26 kg
Sony 7 S/R II + Samyang 14 f2.8: 1,13 kg
Sony 7 S/R II + Sony 16-35 f4: 1,15 kg
So, I'll probably stick with the Oly 8 f1.8 and get the Panny 7-14, because I really want that GH5.
And maybe the upcoming Panny 8-18 f2.8-4 is a stellar performer wide open AND weights around 300g