The foci of NIKA1mm and NIKA2mm show consistently a significant difference of ~0.3mm (assuming of course, the foci performed this way with NIKA are reliable !). Two examples are shown below (foci at best weather conditions).
As the 1mm and 2mm arrays are not perfectly aligned this should be in principle expected because of the beam broadening in not focused data. The focus difference depends on the (azim,elev) offset of the pixels used for focusing (thus on alignment of the two arrays and elevation), the HPBWs, ...
The data obtained during run #4 do not allow any deeper analysis, i.e. this and the reliability of the foci has to be checked during the coming run. Another open question: variability of the focus across the FoV.