Extremely powerful with a high price

My history:
Previously, I photographed as "interested amateur" on the Nikon D90 to 90% with a Nikkor 50mm 1.8 prime lens and was perfectly happy in fact. What I lacked in the long run, the video function, especially for our children was documented. Since the new Nikon AF have the motor is no longer integrated in the housing, a new housing would require the replacement of all lenses. The order required "restart" let me search for alternatives in the field of mirrorless cameras with a smaller chip out of the question for me. So I ended up quickly in the NEX series, with which I am broadly satisfied. However: Today I would resort to NEX 6 that there are low now, especially since it has a better focus and me the viewfinder but something is missing. Just to compact cameras fit the small and lightweight prime lenses I think ideal. Even my wife is initially skeptical forfeited their charm now complete.

The Sigma 30mm: rock solid
For the fixed focal length lenses for me only two were considered: Sigma 30mm 2.8 and even Sony. The Sigma cost ten months ago EUR 100 Sony 450, what I felt as a measured impact and therefore resorted to Sigma. This is, moreover, worthy of all honor and produces especially sharp crack from decent lighting conditions, natural images that are also presented with my D90 Set in the shadows. Over time, however, I found the limit of a 2.8 aperture as too restrictive, as the camera came with no flash in dimly lit rooms, for example, to their limits. Flash photos I find cruel with small Aufteckblitzen, possibly to flash with hard or backlight acceptable. So I decided after prolonged rag to change.

The Sony: outstanding
The lens is performed again valent compared to Sigma, with full metal body and excellent craftsmanship. This is of course positive, but is reflected in slightly higher weight down. The length is a few millimeters larger, whereby the entrainment in the pocket is difficult. Since compactness and low weight are the (only) two advantages over a DSLR, you should consider this thoroughly.
Now the most important thing, the quality of the images. All I can say for my model - excellent. Above all, and because of the additional cost Sigma has paid immediately, by a) the large aperture of 1.8 in conjunction with b) the very good optical image stabilization. Still life be imaged sharp from the hand with 1/20 second shutter time. Along with the large aperture are available-light shooting possible even in very dimly lit rooms. The distance to the Sigma is huge in this respect. The exemption of objects is great, with beautiful bokeh as well as the autofocus, the biggest weakness of NEX5 seems to me faster than the Sigma. Total: Top-lens!

The price premium I still find steep, although the Sigma now costs 200 EUR and Sony 400. When I consider that a Nikkor 50mm 1.8 for Nikon DSLR will cost 105 EUR, which is already fierce. So Sony has also miscalculated something that just seven reviews at Amazon speak for meager sales. Fair would I think 300-350 EUR, but ok.

The bottom line is an excellent lens, the NEX 5N my has made a huge leap. The hefty price has mE paid off, but it costs the fifth star.