Nov 22 2005: Sigma 50mm f2.8 EX DG Macro v. Canon 50mm f1.4 USM v. Canon 50mm f1.8 MKII. Brief overall comments:
I. The EX wide open (f2.8) is quite impressive. The MKII is 1-1/3 stops down by f2.8 while the USM is a whole 2 stops down, so keep this in mind.
II. The main area of weakness for the EX is in harsh lighting; contrast suffers and the "DG" coatings "seem" insignificant.
III. The EX is simply untouchable in edge performance; it renders remarkable results.
IV. In pure center sharpness, the USM slightly outresolves the EX at f2.8. In contrast and overall "pop" the USM is a bit better.