The Sigma 50/1.4 EX DG offers a very nice combination of bokeh, sharpness and clean imaging across the frame. It offers outstanding field illumination, and seems to be optimized for closer range and wider apertures.
At 1/3 the price of the Canon EF 50mm f/1.2L, it offers outstanding value. This lens acquitted itself well enough that I would consider buying one, especially for low-light shooting at f/1.4 - f/2, and I’d advise anyone considering the Canon 50mm f/1.2L to give the Sigma 50/1.4 a close look. For one thing, the Canon offering has such strong focus shift that the Sigma is likely to produce sharper results in the f/2 - f/4 range for that reason alone. For another, the illumination at f/1.4 is highly competitive with the Canon 50/1.2L stopped down to f/1.4.
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Since 2006, Diglloyd Advanced Photography is the authoritative review and reference for DSLRs and their lenses: Canon and Nikon primarily, but also Pentax and some medium format. Reviews of key DSLRs are included, but the primary focus is on lens performance. Also included is a wealth of technique and workflow approaches.
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