Great lens, questionable compatibility (using a NEX 5r)
27 September 2014
Summary: Pros: This is a very good lens, especially for the price. It's sharper than the kit lens, even at f2.8 compared to f4, but honestly for me, it's not really a very significant difference unless you start pixel peeping. The main reason why I got this lens was to have a faster lens than my kit lens with auto focus so I wouldn't always have to resort to manual-focus legacy lenses in low-light situations.
Excerpt: Image quality on the Sigma 30mm f2.8 is nice for a lens in this price range. Looks great and is compact. However, there is no manual/auto focus switch on the outside, which means you can only switch between the two in-camera. So, don't buy this if you're planning on using it with the Black Magic Pocket camera. Some people report that it works fine with their pockets, but it definitely did not with mine.
Pros: Easily Interchangeable, Lightweight, Nice image, Strong Construction
way better than the kit lens that came with my camera
25 July 2014
Summary: I'm mixed about this lens. The colors it captures are vibrant and when in focus it's fairly sharp; way, way better than the kit lens that came with my camera. Unfortunately on my Panasonic DMC-G5, the auto-focus is pretty terrible. It hunts, it's loud and nearly inaccurate each time, especially for action shots. In low-light auto-focus is practically useless.
Summary: I own the newer, silver version of this lens. I run it primarily on a Sony Alpha A6000. By now everyone knows the good... it is a good value, prime lens for your e-mount Sony body. For the price, you will have to go with an older adapted manual for anything sharper. For what it is, it is wonderful. The drawbacks... ** It can be painfully slow depending upon lighting. So much so that if I am shooting a portrait, I grab a manual 30yr old 50mm prime / adapter.
Summary: Ordered this in advance of a convention I wanted to document, got the lens in, initial tests seemed ok. But when I got to the convention, within the first day just shooting some portraits the focusing motor malfunctioned, and then the lens completely bricked. Neither camera I tried it on, Lumix DMC-G5 or Olympus E-P3 would recognize there was a lens attached.
Excerpt: Love the lens for photo crispness. It's rated better by the photo experts, which I am not. It works well on my Sony NEX-7 camera and is the equvalent of a 55mm lens. Nevertheless, the big downside is its lack of internal stabilization for the NEX cameras which do not have that. Others who have perfected the technique for taking still pictures while walking around may not see that as detrimental.
Summary: Good sharp lens but need and should have been faster. With Sigma's know how it should have been a f1.2 or f1.4. Focus is sharp on my E-M5. I still don't understand why for what you spend on quality lens, they don't come with hoods.
Summary: I've been using this lens for a couple of months now and I found that the autofocus is even slower than the kit lens. It does take sharper pictures and the depth of field is nice at 2.8. However, there is a one major flaw in the design. The focus ring is made of a very slippery metal ring that gives you no grip whatsoever. It's not an issue if you're using it indoors, but outdoors when it's cold out it is difficult to get a grip.