The Canon 50mm F1.2 has an average review score of 93.5%

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Canon EF 50mm f1.2 L USM
Canon’s lenses are split broadly into two camps: the standard ‘amateur’ lenses and the pro-level L-series optics. The 50mm f1.2 is one of the latter. It’s a fixed focal length lens in an age when almost everyone uses zooms, and it costs more than a semi-pro digital SLR. Let’s put this lens’s maximum aperture into perspective. It’s around three stops faster than a typical DSLR kit zoom. In poor light it could let you use ISO 100 where a kit lens mi...
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100

Canon EF 50mm f/1.2 USM L - Review / Test Report
The full in-depth review from photozone.de
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87