Sigma 35mm F1.4 DG HSM "Art"

Aberrations

The Sigma 35mm does an exceptional job of suppressing color fringing.  In fact, during normal shooting, you are unlikely to see any in areas that are in focus.  In the sample photos below, notice how all edges- even those in the orner of the frame- are virtually free of fringing.  If you look very carefully, you can observe a faint blue or orange glow around bright edges, but this won't have any effect on your final photographs whatsoever.

Full-size Fringing Samples: Click to Download Files

Purple/green fringing does occur in out-of-focus highlights, an optical phenomenon to be expected of just about any lens.   In the photo below, the subject is just slightly out of focus and a faint fringe is therefore visible.

Click here for another full-size example: a poorly-focused landscape photo.

100% Crop	Original Image

Ghosting and flare, like color fringing, is minimal.  In the photo shown below you can see slight star-shaped ghosting caused by the sun's reflections in the water.  There is also a small amount of lens flare (aperture-shaped halos) near the goose on the left.  Despite the fact that there are plenty of blown highlights in the photo below, there is hardly any fringing in the parts of the frame that are in focus.

Full-size flare/ghosting sample: Click to Download

Overall, this lens truly amazed us in terms of its control of aberrations.  Even though in-camera lens corrections aren't available because it's a third-party lens, the Sigma 35mm rivals the best of the best from Pentax.