You asked
Is the laowa 15mm f 2 zero d good on aps c?
Here is what the site says about that.
From Laowa 15mm f/2 Zero-D: Laowa 15mm f/2 Zero-D: A prime lens by Laowa for Full frame cameras, 15mm f/2. A fast ultra-wide for astro; the Leica M version is sold as the LM. Specs - Maker: Laowa - Focal length: 15mm (prime) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, Canon RF, Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame ...
From Laowa 9mm f/2.8 Zero-D: Laowa 9mm f/2.8 Zero-D: A prime lens by Laowa for APS-C cameras, 9mm f/2.8. A small, nearly distortion-free ultra-wide for APS-C.
Quoted from this site's pages.