Since one does not have to think twice

For NEX-series there are not many lenses, and some are from the quality just average. Not so the 50s:
By 1.8er panel of this glass is so much brighter than the Kitzoom, the 50mm in the field allows only aperture 5.6, that buying is therefore very useful. Considering then how beautiful the blur gradients this 50s, you want to first make just one week portraits :)
Focus with its extra large ring a lot of fun, especially since it runs very smoothly. Optical quality and workmanship are therefore at a high level.
However, what irritates me is that you can in this lens compared to 18-55 more engine noise heard when it directly against the ear sets (do not worry, just right to hear the case, for example, not in the film sound). But could not negatively affect the battery life of my NEX-5 notice although humming something in the 50s almost without ceasing or buzzes.

All in all, as "Always plan" certainly too long focal length, but as "Always with you" a super lens that always scores when you have little light and can go far enough away from the object ... Clear recommendation on my part.