Solid lens, good price, great choice for any APS-C shooter
Stephen Mahanes, Amazon
19 August 2014
Summary: Basically a 50mm f/1.4 prime lens when used on APS-C. That's about the ideal single-prime configuration. Couldn't be happier! Camera body tested: Sony DSLR-A700 (APS-C) PRO: -Standard lens! 30mm has the same field-of-view as a 45mm lens on an APS-C sensor. This is in "standard lens" territory, a solid approximation of a 50mm f/1.4 lens on a full-frame body. -focus is smooth and solid.
Summary: This is a great lens for photographers who want to deal in f/1.4 apertures without the insane pricetag that normally accompanies that class of lenses. It's the perfect balance of lens for mere mortals looking to go deeper with their skills. Bokeh is simply stunning, color/tone is nominal, and the AF is fairly snappy as well.
Summary: I am using for comparison the Pentax 31mm f/1.8 fa limited lens, this may not be fair sense the Pentax is currently almost 4x more money, but I feel the Sigma compare quite well to this lens in image quality where it counts on a lens of this type the center is very sharp! I mostly use this for portraits and picture that I want a creamy brokah to give a picture a 3D pop and this lens delivers!
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: I used this lens on my Canon 7D. It takes extremely sharp photos, and is able to focus very quickly. I have had to do minimal lens correction in Lightroom, and only for perspective, not for color aberration. I think it's a very nice lens at a very nice price. I later purchased the Canon 5d Mark iii and this lens still worked on that body, even though Amazon says it will not. There was some very minor vignetting. Regardless, I sold the lens to purchase a zoom lens.
Excerpt: You need to have this in your bag! I bought this lens for a few main reasons. I wanted a really fast aperture for low-light conditions and a prime lens. The Sigma for me has it all. Its sharp, crisp and extremely quiet. Auto focus at f1.4 for me was a challenge at first. the more you use it the easier it becomes.
Pros: Consistent Output, Easily Interchangeable, Fast / accurate auto-focus, Great build quality, Great in Low Light, Nice Bokeh, Strong Construction