Comparison of SFRs computed using different methods for zCOSMOS galaxies with ISAAC NIR spectroscopy. Panel a) shows a good agreement (within the measurements errors) of the SFRs from ISAAC Hα and SFRs from infrared COSMOS IRAC and MIPS data for the objects with infrared detections (Le Floch et al., in prep.). Panels b)−d) show the comparison of Hα-based SFRs with b) SFRs from the [OII] luminosity, applying the calibration reported by Gilbank et al. (2010), their Eq. (8), and taking into account the erratum of Gilbank et al. (2011) of that paper; c) SFRs derived from the [OII] luminosity using Eq. (2) of Maier et al. (2009), based on the study of Moustakas et al. (2006); and d) SFRs from the Hβ luminosity, assuming A_V = 1 (an assumption often used in literature when the Balmer decrement cannot be measured) to derive Hα luminosities. The best agreement between the reliable extinction-corrected Hα -based SFRs and SFRs estimators based on other ELs (panels b)−d)) is depicted in panel b).