Summary: Bought this instead of the kit 16-50 zoom for a Sony NEX-6, for the wider aperture, and as I am getting a 16mm pancake lens anyway.This is a very good lens, the bokeh from the 1.8 aperture is superb. Ive used it at both extremes of aperture, F1.8 and F22 and has given excellent results. Its also extremely light weight, suprisingly so, yet seems very well built.
Summary: I bought this lens primarily for portrait photography and some video work. It is mounted to a Sony a99 and has been used on my old a700 as well. Starting with build quality: The plastics used are of a good quality and matted to the metal alpha mount. It features a rubber focus ring that does attract dirt and dust but is smooth, if not a little on the thin size, when used.
Summary: I am trying to find equivalent lenses for switching from my mid-range Canon EOS-D environment to Sony NEX. I am a happy user of the SEL-P1650 and SEL-55210. All these lenses (the SEL-50F18 being the third) are good optical quality for my taste. One thing that I am not fully happy about is the focus point. Especially for a low depth of field/fast lens such as the 50F18, you may later find that the focus is not where you thought it would be.
Summary: When I first bought this lens I was delighted: sharp, fast and a fantastically tight depth of field which makes for some creative photos. Since then I have bought the Carl Zeiss 135mm f1.8 which is fantastic and makes one a little picky. It's perhaps not fair to compare with a lens that costs a grand more, but if you do, the lens under review can be criticised for significant chromatic aberration.
Summary: I can't believe how much the price of these has come down. Mine was £300 used a couple of years ago, get one quickly before they go up again. First and foremost this is a very fast lens of course. f1.4 allows you to produce either an incredibly shallow depth of field or to work in some pretty poor light. In combination with the legendary low light performance of my A580 this lens is a low light must have.
Summary: It may seem a bit expensive compared with Canon and Nikon 50mm primes, but the quality is great, and at F1.4 it is actually a very useful low-light/available-light standard lens. Great choice for social photography, parties, weddings, e.t.c. And, if you're not familiar with prime lenses, you'll be stunned by the quality of the pictures you get. Pros - Faaaast f1.4, great image quality, compact size, good build quality. Cons - Ok, it is quite pricey.