Best wide angle lens for the nikon df?

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From Nikon Df: Nikon Df: A DSLR by Nikon with a 16.2-megapixel full frame sensor, announced in 2013. Retro dials on a full-frame DSLR with the D4's 16MP sensor. Specs - Maker: Nikon - Mount: Nikon F - Sensor: Full frame, 36 x 24mm, crop factor 1.0 - Resolution: 16.2 megapixels - Stabilisation: none in the body; use stabilised lenses for slow shutter speeds - Announced: 2013 - Type: DSLR Focal lengths on it Full ...

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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