Summary: Producto 100% recomendable. Servicio rapido y confiable. Lente de muy buena calidad, buenos acabados. Profundidad de campo decente, nitidez muy buena. Enfoque normal para ser Sigma y no Nikon. Precio y calidad en su justa medida.
Summary: It is better than Canon 50 mm F/1.4 for a crop DSLR, and it is much cheaper than Canon 35 mm F/1.4 L. There might be some mis-focus based on different samples. My first one has a misfocus ~1.5 cm when implanted on my Canon T2i. Then I returned it back and changed it into a new one. The second one is perfect.
very soft.terrible quality control overall, do not buy or try at least more
8 March 2013
Summary: tested 4 of these lenses , they were all VERY SOFT. recently i borrowed the same lens from a friend to give it another try. that one was sharp. also recently Sigma advertises with ; "enhanced quality control" . nice they more or less admit the previous era was terrible! And indeed the latest sigma's (end 2012, start 2013) are generally much better in IQ and QC.
If you own a cropped sensor camera, get this lens!
7 March 2013
Summary: I have had this lens for about 2 months at this time of writing my review. This is my first prime lens for my 60D cropped sensor camera and my first non Canon lens. Canon does not make the perfect 1.6 cropped lens. No idea why which is why I was drawn to this lens. This lens has become my walk around lens or the lens that stays on my camera all the time unless I know that I am shooting something specific that requires another lens from my small arsenal.