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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Company Sigma Sony Sony
Model 30mm f/2.8 EX DN E 35mm f/1.8 OSS E 50mm f/1.8 OSS
MTF Charts Sony E 50mm f/1.8 OSS mtf chart
Initial Price $280 $450 $300
Release Date 01/2012 09/2012 08/2011
Discontinued
Lens Mount
Micro Four Thirds Mount
Sony E mount
Sony E mount Sony E mount
Lens type Fixed Focal Length Fixed Focal Length Fixed Focal Length
Resolution - - -
Chr. aberration - - -
Vignetting 0.0 EV - -
Transmission - - -
Distortion 0.00% - -
Focal Length 30.0mm 35.0mm 50.0mm
Lens construction 7 Elements in 5 Groups 6 elements in 8 groups 9 elements in 8 groups
Stabilization system No Yes Yes
Diaphragm Blades 7 aperture blades circular opening 7 aperture blades circular opening 7 aperture blades circular opening
Max Magnification
Angle of view
Zoom Ratio
Maximum Aperture f/2.8 f/1.8 f/1.8
Minimum Aperture
Aperture ring
AF Motor type Linear AF motor Stepping motor Stepping motor)
Auto Focus / Manual Focus switch
Full-Time manual focus
Internal Focusing
Minimum Focusing Distance 30.00cm 0.30m 0.39m
Internal zooming
Filter Diameter 46mm 49 mm 49mm
Distance Scale
Front lens element rotating
Lens Hood included
Weather sealing No No No
Weather sealing details
Body material Plastic with metal mount Metal Metal
Diameter 60.0mm 63.0mm 62.0mm
Length 38.0mm 45.0mm 62.0mm
Weight
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