If you’re looking for an interesting fast lens for astrophotography the Mitakon Zhongyi Speedmaster 20mm f/0.95 might be a good option for you. This lens was announced earlier this year on FujiAddict, but preorders only just started at B&H Photo.
Lens configuration/MTF diagram
Sample
more Samples↓
https://stkb.co.jp/info/?page_id=27982
via FujiAddict