2MASS vs. VISTA photometry. Clearly residual nonlinearity and saturation effects have an impact on the bright end of the measured magnitudes. For this reason we decided to replace VISION photometry with 2MASS photometry for sources brighter than (13,12,11.5) in , respectively. The shading indicates source density in a 0.2 × 0.05 box in this parameter space. The gray line indicates a running median with a box width of 0.5 mag, and the dotted horizontal line marks the reference value of zero mag difference between the 2MASS and VISTA catalogs.