Is the sony distagon t fe 35mm f 1 4 za sharp wide open?

Here is what the site says about that.

From Sony Distagon T* FE 35mm f/1.4 ZA: Sony Distagon T* FE 35mm f/1.4 ZA: A prime lens by Sony for Full frame cameras, 35mm f/1.4. Specs - Maker: Sony - Focal length: 35mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 35mm. - On APS-C (Sony E): like 52mm on full frame; f/1.4 gives about the depth of field ...

From Lenses: Aperture: The f-number says how wide the lens opens. Smaller numbers let in more light: f/1.8 lets in about ten times as much light as f/5.6, more than three stops. A wide aperture means faster shutter speeds in dim light and more background blur. Zooms with a constant aperture, like a 24-70mm f/2.8, keep the same exposure throughout the zoom range; cheaper zooms get darker as you zoom in.

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