Imageobtained in the r-band with the WFC/INT for the PSZ1 G028.01+25.46 source covering a field of view of 10′× 10′. Circles A and B mark the respective positions identified in this article of these clumps at z = 0.658 and z_phot = 0.60. The square points to the Planck PSZ1 coordinates, and the triangle is located on the Liu+15 counterpart for this PSZ1 source. RGB colour images show magnified regions in each clump. We note that, from our photometric analysis, we do not detect any important concentration of galaxies with z_phot = 0.284 around the Liu+15 coordinates.