Photometric redshift accuracy of our K_s< 22-limited sample. Top: T0007 photometric redshift as a function of spectroscopic redshift for bright (i< 22.5 ∩ K_s< 22) and faint (i> 22.5 ∩ K_s< 22) galaxies. The dashed lines delimit the σ_{Δz/ (1 + z)} ≤ 0.15 area, outside which photo-z measurements are considered as outliers. The accuracy estimators written in the upper left corners are weighted with respect to the i-band distribution of our photometric sample (see Sect. 3.2). Bottom: dispersion, outlier rate, bias, and spectroscopic redshift number () as a function of photometric redshift (left) and i-magnitude (right), using the T0007 (blue) and CFHTLenS (red) optical photometry.