Zeiss has recently introduced two new prime lenses. The Zeiss Touit lenses are available in 12mm F/2.8 and 32mm with F/1.8 complete with Auto Focus support on cameras such as the Fuji's X Mount and Sony E Mount (NEX) cameras. Pricing starts at $900-$1250 US (found here).

Zeiss Touit 12mm F/2.8 and 32mm F/1.8 Sony E Fuji X Mount Prime Lenses

If you're looking for more affordable Prime Lenses for Sony E Mount cameras with Auto Focus, don't forget about the Sigma options. Sigma offers 19mm, 30mm, and 60mm prime lenses with max apertures of F/2.8 for the NEX camera system. No kidding when I say more affordable, in fact you can still get a bundle deal for both a 19mm and 30mm F/2.8 lens for just $199 (here)

Sigma 19mm 30mm 60mm F/2.8 Prime Lenses for Sony NEX.