Photometric estimate of the JKCS 041 redshift. Color track of SSP (solid black) and τ = 0.1 (red dotted) models with different formation redshifts, z_f = 5,4,3 (from top to bottom), are plotted, after zero-pointing them to the observed color of IRC0218A cluster at z = 1.62. The measured color difference is indicated with an horizontal line, and its error shaded. By simple eye inspection of this figure, the JKCS 041 photometric redshift is z ~ 2.2.