Sony FE 55mm F1.8 ZA Carl Zeiss Sonnar T* lab test report

The Sony FE 55mm F1.8 ZA Carl Zeiss Sonnar T* is one of the first lenses for Sony's fledgling full frame mirrorless system, and designed as a fast 'normal' prime to complement the Sony Alpha 7 and 7R. However at around $999 / £900, it costs several times as much as the 50mm F1.4 options for DSLR systems. So what exactly are you paying for? Click through for the lens test data and our analysis.