Summary: It's a fantastic lens, especially for landscape photography (f/9-f/11 is the sweet spot); the bokeh is also quite admirable. Honestly, I see no point in passing this up for Sony's pricier 35mm lens. I realize that one has optical steady shot, but given the difference in price you could pick up a good tripod to help you capture those shots requiring the steadiest of hands.
Summary: I am very pleased with the sharpness and image quality coming from this lens, on my Sony NEX-6. For the price, you really can't beat it. It's a great walk-around lens, though in retrospect, I might have gotten the 60mm first since I like to shoot "tight", however since it's not that much more than this, it's my next lens. IMO, you can't go wrong with this lens, other than misplacing the lens hood, like I have.
Excerpt: I use this with Sony A6000 excellent combination. This lens is so good that forget about that sound inside. For $ bucks that quality, WOW! The only downside (and this relates to A6000, not the lens) is that camera does not allow the use all phase-detect AF points all across the sensor, only in the center.
Summary: Unfortunately, I was part of those that received a dud! Did not work. It's sad because I really wanted this lens. I think sigma should look into this issue because it's not the camera. I would have exchanged it but i can't chance it getting on a job and not work. I'd rather buy a sony lens with not as good quality as long as it works every time.. I hope they update these lenses to work with EVERY sony.
Summary: Don't be fooled by the price. Although it is generally true that you get what you pay for, sometimes you get more than you bargained for.This is an awesome lens ....... Very sharp ..... Superb IQ. It is on of my favorite lenses to use on my a6000. It has the perfect FOV for a walk around lens. I highly recommend it.
Summary: A far better lens than the price would suggest. I've never been a Sigma fan, but this lens changed my mind (along with its 60mm sibling). When the camera is powered down, the slight rattle (caused, I believe by floating elements that are held in place by electromagnets) is a little disconcerting at first, but I got used to it. Small price to pay for the excellent images.
Summary: I received my lens in a box that was scotch taped shut. The protective plastic wrapping around the lens had been opened and the sticker used to seal the plastic shut had been removed and stuck to the bottom of the bag. The lens was completely non-functional and had dust and scratches on the front and rear lens elements, and some sort of black residue in the center of some internal lens elements. The lens was not registered by my camera. This is completely unacceptable.
Summary: My excitement turned to disappointment when I opened the box to find what looked to be a returned defective lenses. The hood and lenses were out of their plastic wraps and there was a mark or some kind of debris in the lenses. I purchased a new lenses and got something that was used. I mounted it on my A6000 and it gave me the same problems other people got. Refused to AF and went into MF.
Summary: Dramatic improvement in image quality versus the standard 16-55mm kit lens on our NEX-6. Exactly what I was hoping for and expecting after reading a great review at DXOmark. Will likely order the Sigma 19mm Prime in the future. The largest improvements versus the kit lens are indoors in low lighting, vastly superior bokeh & separation from background/foreground at low apertures, and a big jump in image sharpness.