At present perhaps the best standard lens for Nex7

Having tested many (half paid) manual lenses on the NEX7 (Vivitar 35 1.9, Minolta 28 2.8 55mm, Nikon 28 2.8 AIS) I'm the two new Sigma DN (19 and 30 mm) ordered out of curiosity and simply impressed of the Bildqualiät the two lenses. Especially in the corners of these lenses a lot (!!!) are sharper than the others mentioned lenses, particularly at f 2.8 to 5.6 begins. The build quality is naturally not equivalent to the beautiful old metal lenses. However, the Sigma are also much lighter and smaller (especially when the adapter for manual SLR Lenses with reckons)., Which I think is better suited to the concept of NEX cameras
The Sigma 30mm f 2.8 offers of a uniform sharpness across the entire image, with a slight increase in aperture 4. This is probably due to the optimized path of the light between the lens and sensor. Unlike wide-angle lenses that have been counted for negative films, meet here, the light beams at the edges of the APS-C sensor in a (relatively) obtuse angle. Obviously, this is a prerequisite for good picture quality at NEX7 sensor.

For less than EUR 200, the lenses are measured at the necessary image quality almost free!