Summary: Let me preface this review by saying I paired this lens with a brand new Canon 70D. So I know the issues are with the lens and not my camera. I did extensive research on this lens. everyone and I mean EVERYONE on Youtube says it is amazing. I found it lacking. + Pros: wonderful build and feel.
Summary: First off know what you're buying...but if you do, you won't be disappointed. This is by far the sharpest lens I've shot with. I plan on shooting with this far more extensively but wanted to say I'm impressed.
Excerpt: I love this lens! Nice clarity at 18mm, 24mm and 35mm and everywhere in between. Amazing f1.8 sucks in light. Looks great for landscape, night sky and low light stills and video while also good for group photos. Doesn't have a quick auto focus but beautiful imagery.
Excerpt: Let me start with a disclaimer: this lens is not for everyone. It's heavy, has a limited zoom range and needs to be calibrated with the Sigma USB Dock for it to focus accurately on most bodies. If you want something easy to set up and to carry around, maybe you're better off with something else.
Pros: Durable, Nice Bokeh, Strong Construction, Superior Optical Quality
Excerpt: This lens is an excellent tool and fills a nice niche for low light work on a crop sensor. But on my 7D Mark ii I like to use off center focus points and had too much troble achieving reliable focus off center. So I will be returning it.
Excerpt: I haven't noticed any issues with this lens. I use it with my T4 and mostly for portrait shots. I am able to get sharp images with nice blurry backgrounds - bokeh. I used to use a 17-55mm 2.8 and loved that lens but I think this one may be a little sharper.
Pros: Consistent Output, Durable, Good in low light, Nice Bokeh, Rugged, Strong Construction