Zeiss Touit 12mm f/2.8 Distagon: MTF and Distortion and Vignetting Charts (for Sony NEX + Fuji X)
In Guide to Mirrorless are added MTF charts for the Zeiss Touit 12mm f/2.8 Distagon and also distortion graphs for the Zeiss Touit 12mm f/2.8 Distagon on Sony NEX and Fuji X.
Both pages include commentary, and the MTF pages include notes on the relative performance to the Zeiss 18mm f/3.5 Distagon and Leica 18mm f/3.8 Super-Elmar-M ASPH.