Sigma 18-50mm f/2.8 DC Lens Review - page 3

Full View:

50mm, f/2.8

Canon 50/1.4 @ 50mm, f/2.8

Sigma 18-50/2.8 @ 50mm, f/2.8

Canon 24-70/2.8L @ 50mm, f/2.8

50mm f/4.0:

Canon 50/1.4 @ 50mm, f/4.0

Sigma 18-50/2.8 @ 50mm, f/4.0

Canon 24-70/2.8L @ 50mm, f/4.0

50mm, f/5.6

Canon 50/1.4 @ 50mm, f/5.6

Sigma 18-50/2.8 @ 50mm, f/5.6

Canon 24-70/2.8L @ 50mm, f/5.6

50mm, f/8.0

Canon 50/1.4 @ 50mm, f/8.0

Sigma 18-50/2.8 @ 50mm, f/8.0

Canon 24-70/2.8L @ 50mm, f/8.0

Again, f/11 looks no different from f/5.6 in terms of sharpness and the small aperture problems of diffraction only seem to show up with the 18-50 at much wider angles.  All the lenses look very good at this focal length but the 50/1.4 might once again have a focusing issue.  This is one reason I do not use it much.  I know that it can be sharp, it just isn't always so.  Anyway, I am impressed with the results.

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