Is the viltrox af 50mm f 1 8 sharp wide open?

Here is what the site says about that.

From Viltrox AF 50mm f/1.8: Viltrox AF 50mm f/1.8: A prime lens by Viltrox for Full frame cameras, 50mm f/1.8. Specs - Maker: Viltrox - Focal length: 50mm (prime) - Maximum aperture: f/1.8 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 50mm. - On APS-C (Sony E): like 75mm on full frame; f/1.8 gives about the depth of field ...

From Viltrox AF 9mm f/2.8 Air: Viltrox AF 9mm f/2.8 Air: A prime lens by Viltrox for APS-C cameras, 9mm f/2.8. A tiny autofocus ultra-wide for APS-C.

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