Summary: This is the first prime lens I bought for my NEX 6 and can really tell the difference with the wider aperture. Much better background blur when taking portraits indoors and out and sharp. I'm new to interchangeable lens cameras and bought the NEX 6 with the SEL1650pz and SEL55210 as a kit. Happy with both but wanted something a little faster. For the price I couldn't be happier.
Summary: Cheap lens that delivers good image quality It is not the sexiest lens in nex line but it looks good and deliver good image quality. Not really fast but rather sharp. The focal distance is great for environmental portrait.
Summary: This lens is very sharp with minimal aberrations and images look great. Adding mage stabilization would be a plus, but not if it diminished its excellent image quality. It does make rattling sounds until mounted on the camera and powered on, but this is normal with this lens and has not been a problem.
Summary: I like the picture quality, and have taken beautiful pictures with, i like the size and i can keep it in my camera most of the time with out feeling like im compromising image quality, that happens when I have the Olympus lens cap. So far i like it, but i do hope it last because when you move it it seems the parts inside move and that worries me a little.
Summary: I bought this lens after David Taylor-Hughes and Roger Cicala independently described it as the lens deal of the year. If you want a dissenting view, see Kurt Munger's review: he suggests this lens is too similar to the 18-55mm kit zoom lens that most NEX owners already have (the Sigma allows larger aperture, the zoom has SteadyShot). Like others here, I have found this lens sharp, smallish, lightweight, inexpensive, and a useful focal length.
Summary: I really like the size of this lens but I have to say I'd prefer it to be a little faster. I tend to avoid the max aperture on cheap lenses and would rather be stopped down a bit at f/2 than wide open at f/2.8. That being said this lens is a decent performer wide open and for the price you won't find a better 30mm in E mount (or any really). But I will be trying the Sony 35mm f/1.8 when it comes out as possible replacement. Some people complain about the thunk it makes.
Summary: Fast-focusing, extremely sharp - even wide open and beautiful color rendering. What more can you ask for for $200? It's not as compact as the Panasonic or Olympus pancakes, but it's still smaller than most kit zooms.
The Sigma 30mm is a nice prime lens for street photography at a fair price.
3 August 2012
Summary: If you have bought the Sony Nex 7 for street photography you already know the standard 18-55 kit lens is mediocre and are looking for a reasonably priced prime lens that produces higher quality images and is less obtrusive. The Sigma 30mm fits the bill. It also handles the automatic functions of the camera like the standard kit. Especially for the fair price, the Sigma is a nice improvement to the camera.