Best wide angle lens for the leica sl2?

Here is what the site says about that.

From Leica SL2: Leica SL2: A mirrorless camera by Leica with a 47-megapixel full frame sensor, announced in 2019. High resolution and in-body stabilisation in a weather-sealed body. Specs - Maker: Leica - Mount: L-Mount - Sensor: Full frame, 36 x 24mm, crop factor 1.0 - Resolution: 47 megapixels - Stabilisation: in the body - Announced: 2019 - Type: mirrorless camera Focal lengths on it Full frame is the reference size: lenses frame as marked. ...

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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