"50mm lenses were almost a forgotten species but during the very recent years they have seen a revival - on APS-C format cameras they are something like a moderate tele lens and as such a quite attractive option for portrait- or street-photography. Now Sony did a little more than just releasing a "plain" 50mm lens - they added an optical image stabilizer ("Optical Steady Shot" in Sony terms). The Sony E 50mm f/1.8 OSS is also the fastest stabilized system lens ever built (as of the time of this review). This was certainly a difficult engineering task considering the centering effects on the optical system at such large apertures."