Sigma 12-24mm f/4.5-5.6 DG II HSM Lens Image Quality Comparison

Load Comparison Images

Following are 100% crops from the extreme bottom-left of the frame captured by a Canon EOS 5D Mark III full frame DSLR. Images were processed in Digital Photo Pro using the Standard Picture Style with a sharpness setting of "2" (low).

Load Comparison Images

Corner sharpness at 12mm with a wide open aperture is great until near the extreme full frame corner where details become strongly blurred. Both sharp and soft details can be seen in the 12mm f/4.5 crop example. The extreme 12mm corner steadily improves as the aperture narrows with excellent sharpness at f/11.

Corner sharpness is good at 16mm with a wide open aperture and by f/8, the corner is quite sharp. Based on the bottom left corner of the frame, this lens appears to have good sharpness into the full frame corner at 24mm even with a wide open aperture. Stopping down has little significance for 24mm corner sharpness.

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