Is the sony fe 28mm f 2 sharp wide open?

Here is what the site says about that.

From Sony FE 28mm f/2: Sony FE 28mm f/2: A prime lens by Sony for Full frame cameras, 28mm f/2. Specs - Maker: Sony - Focal length: 28mm (prime) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 28mm. - On APS-C (Sony E): like 42mm on full frame; f/2 gives about the depth of field ...

From Sony FE 40mm f/2.5 G: Sony FE 40mm f/2.5 G: A prime lens by Sony for Full frame cameras, 40mm f/2.5. Tiny and sharp: a lovely everyday lens on the compact bodies.

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