Is the nikon af s 58mm f 1 4g sharp wide open?

Here is what the site says about that.

From Nikon AF-S 58mm f/1.4G: Nikon AF-S 58mm f/1.4G: A prime lens by Nikon for Full frame cameras, 58mm f/1.4. Specs - Maker: Nikon - Focal length: 58mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Nikon F - Stabilised: no - Autofocus: yes What it frames like - On full frame (Nikon F): as marked, 58mm. - On APS-C (Nikon F): like 87mm 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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