The reader is strongly advised to read the lens evaluation notes.
This page evaluates the Nikon AF-S 50mm f/1.4G and AF-S 50mm f/1.8G. The ƒ/1.4 lens costs slightly more than twice as much as the ƒ/1.8 lens, being 2/3 stop faster. But is it a better lens?
Both lenses were focused the same way (contrast detect AF at maximum magnification). Both appear well focused at center, and follow similar behavior as stopped down.
No guarantee can be made that the zone of focus was ideal for either lens. Nor is any evaluation made for focus shift, which could be present in both lenses (more likelihood of that with the 50/1.4G).
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