Preliminary distortion map of the JHK×27mas camera derived from the ω Cen data (which for the JHK×13mas camera is similar). The dominant term is not from the camera, but comes from the anamorphic magnification due to the high angular tilt of the IR/VIS dichroic. Here only this linear term was corrected. Higher order terms are a factor of 10 smaller, and below the noise limit of these data. The dotted circle in the right panel represents a 50″ aperture where the RMS residual is only 12 mas even in these noisy data. The centre left region of the map is empty because of the bad pixel cluster.