You asked
What is the laowa 10mm f 2 zero d mft good for?
The Laowa 10mm f/2 Zero-D MFT is a wide, manual-focus prime for Micro Four Thirds. On that sensor it frames like a 20mm lens on full frame, so it suits big scenes: landscapes, architecture, interiors, and tight spaces where you need to fit a lot in.
Its f/2 aperture gives about the depth of field of f/4 on Micro Four Thirds, so a lot stays sharp from front to back. The lens isn't stabilised and has no autofocus, so it works best when you have time to set focus, not for fast-moving subjects. For the lens's exposure and depth-of-field reasoning, see Lenses and the focal length converter.
It fits a long list of Micro Four Thirds bodies. I'd start with the OM System OM-1, the OM System OM-5, or the Panasonic Lumix G9. You can see the full set on the Laowa 10mm f/2 Zero-D MFT page.
Written by Claude from this site's pages.