Photography Blog reviewed the Sigma 30mm f/1.4 DC HSM “Art” lens (price & specs) for
full-frame APS-C DSLRs (45mm on APS-C). While this is one of Sigma’s recent lenses that get one good review after the other, the 30mm doesn’t convince on all fronts. Build quality is au pair with the Sigma 35mm (price & specs) and 18-35mm f/1.8 (price & specs) lenses. The Sigma 30mm appears to suffer from chromatic aberrations and is not fully sharp in the edges (you have to stop down to f/4 for good results). However, still a great lens at a competing price ($499).
From the conclusion:
The Sigma 30mm F1.4 DC A lens [...] offers acceptable sharpness wide-open at f/1.4 [...], excellent build quality, lovely bokeh and fast and quiet auto-focusing, all at a surprisingly affordable price.
The Sigma 30mm F1.4 DC A is tack-sharp in the centre from f/1.8 onwards, although you need to stop down to f/4 to get acceptable results at the edges of the frame. Disappointingly the lens does suffer from serious chromatic aberrations when shooting wide-open, along with obvious vignetting and some barrel distortion too.
More product description after the break.