Comparison of the VIPERS K-band photometry with the Ultra-Deep UKIDSS field (top left), the VIDEO XMM2 field (bottom left), and the scatter distributions in three magnitude bins (right panels). The observed scatters are reported in the left panels as red circles, while the green solid lines show the mean magnitude vs. error behaviour of our VIPERS K band data after rescaling the original errors by 1.5 (see text). Larger dispersions are observed with VIDEO than with UDS because of the different depths between the two fields.