Comparison between SDSS/DR12 and J-PLUS data. Taking advantage of the overlap between the two surveys, we selected a sample of ~300 k common detections to quantify the level of agreement between the two data sets. Colors rather than magnitudeswere used since they are less sensitive to different aperture definitions. An intrinsic dispersion of ~10% (σ = 0.13) and negligible bias (μ = –0.001) was observed for sources as faint as a magnitude g_SDSS = 21.