Not only in Fred Miranda, but also in the digital picture, side by side with the Canon f/1.4, from f/1.4 to f/2 they look the same, and from f/2.8 to f/16 the Canon EF 50mm f/1.4 is by far better over all (more sharp in mid-frame and corner and less CA !)
And if you compare the Canon 50mm f/1.2 side by side with the Sigma 50mm f/1.4 Art, woooww the slap that the sigma give to Canon hahaha, shame on Canon
out of all the 50's in canonland, it's probably the most reliable. I still think it's priced too high, but you certainly get some value for your money. It focuses better than the F1.8 and 1.4 counterparts, bokeh is a little blurrier, and weather sealed.
here's a realistic comparison aside from test charts: http://www.diyphotography.net …ompared-canon-50mm-f1-2l/
sigma is technically better, but I'de go on a limb to say that the full image looks better on the L. Why should canon be ashamed? it's an old design vs new design.
How does it compare to the 50L and 50 f1.4 by Canon in terms of image quality?
the nikon 50mm F1.2 AI is very comparable. Nice lens.
as for prints with the 50L? I only print small with the lens. It's my snapshot lens, and it's very good at it.