Best wide angle lens for the sigma fp?

Here is what the site says about that.

From Sigma fp: Sigma fp: A mirrorless camera by Sigma with a 24.6-megapixel full frame sensor, announced in 2019. The smallest full-frame body there is: a brick of a camera, beloved for video. Specs - Maker: Sigma - Mount: L-Mount - Sensor: Full frame, 36 x 24mm, crop factor 1.0 - Resolution: 24.6 megapixels - Stabilisation: none in the body; use stabilised lenses for slow shutter speeds - Announced: 2019 - Type: mirrorless camera Focal ...

From Laowa 15mm f/4 Wide Angle Macro: Laowa 15mm f/4 Wide Angle Macro: A macro lens by Laowa for Full frame cameras, 15mm f/4. An ultra-wide that focuses to 1:1.

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