Sigma 30mm EX DN lens for Sony NEX mount review at Photozone: Excellent performer, we know it, because we sell them....downunder!

This Sigma 30mm F2.8 EX DN has a minimum focusing distance of 30cm
Ultra compact construction weighing only 4.8 oz and measuring 1.5 inches in length

I learned something today: Photozone.de now sells lenses...in Australia? Anyway, the Sigma lens seems to be an excellent performer, to the point of outresolving the NEX-7. I wonder how much better the new 'Art" series 30mm DN lens will be:

"The Sigma AF 30mm f/2.8 EX DN is capable of delivering an outstanding center performance straight from f/2.8 - it even broke the existing record for the Sony NEX 7 as of the time of this review. The lens is basically "diffraction-limited" in the image center so stopping down has no effect on the center performance anymore. The outer image regions reach a good level at f/2.8 and improve to very good (just) figures at f/4 to f/8. The overall performance diminishes from f/11 onward - this is a typical diffraction effect and no problem of the lens.

The Sigma AF 30mm f/2.8 EX DN is a cute little fellow but not only that - it's good quality stuff, too. This is especially true for the center performance which is nothing short of breathtaking in the relevant aperture range. The image borders & corners aren't quite as hot but decent enough for sure. Distortions are basically absent and you don't really need to worry about vignetting that much either. Unfortunately the amount of lateral CAs is a bit on the high side which reduces the subjective quality perception a bit. While we didn't formally test the bokeh this time it seems to be pretty good when looking at our sample images.

The build quality of this little prime lens is surprisingly good. Thanks to an internal AF the physical length remains constant and the manual focus action feels smooth and without wobbling whatsoever. Sigma's new linear AF motor is both speedy as well as silent. Combine all this with the extremely low price tag and it's obvious that you are getting lots of bangs for your bucks here!"

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