R parameter as a function of redshift. Data for WISE J141046.00+740511.2 are shown in red. R was calculated by using: B-fluxes from USNO and Gaia (red continuous lines) and g′-fluxes from WHT and Liverpool Telescope (the red dashed lines). Upper panel: BZCAT subsamples (set on the basis of their L_1.4 GHz; see Fig. 4). Filled (empty) circles denote that R was calculated by using B-fluxes from USNO A2.0 (g′-fluxes from SDSS DR9) data. Lower panel: comparison of R values between different blazar-types and WISE J141046.00+740511.2.