Carl Zeiss Touit 2.8/12

The Touit 12mm F2.8 is one of Zeiss's first two lenses for APS-C mirrorless cameras, alongside the 32mm F1.8. It's a premium wideangle prime that offers an 18mm equivalent angle of view, and unlike the company's SLR lenses, it includes autofocus. It's available in mounts for Fujifilm X-series and Sony NEX cameras; the X-mount version includes an aperture ring, but the E-mount one doesn't.