Example of Stokes spectra of the “green” Fe i 5247.0 and 5250.2 Å (left panels) and “red” Fe i 6301.5 and 6302.5 Å (right panels) lines recorded simultaneously on the same CCD sensor. The first two rows of panels show the 2D images of Stokes I/I_c and V/I. The grey-scale cuts for V/I have been set low, at ±0.3%, to better bring out the weak flux densities. The last two rows of panels show I/I_c and V/I for the CCD row that is located at 135 arcsec. The recording was made with ZIMPOL-3 at IRSOL at the center of the solar disk on August 11, 2012.