When I first heard about this lens I thought it sounded almost too good to be true. But despite the few shortcomings this is in fact a pretty astonishing lens the guys at Laowa have put together. I also tend to think it is the most versatile ultra wide angle lens I have used so far.
It lets me take crazy close up shots, I can use standard filters on it, build quality is top notch, the size makes it a lens I want to put in my bag and yes, it can also be used for astrophotography. Personally I prefer it to the Samyang 14mm 2.8 (MF) for astrophotography because of the more even exposure and the speed advantage.