Images of HD 34700 A showing the observational data used in this paper, in order of increasing wavelength. North is up and east is to the left. The FoV shown in all panels is 2.16″ × 2.16″. The blue circles represent the coronagraphs, except for LMIRCam observations in L′ band (without coronagraph), where the blue area masks all the spurious signals within λ/D, and ALMA data. In the ALMA continuum image the red line represents the outer ring, while the blue ellipse the inner ring; the continuum beam size is 0.″41 × 0.″ 28 at a PA of −64°. The dashed contours denote levels of [0.4, 2, 4, 6] mJy/beam. The colour bars have arbitrary units except for ALMA; they all have linear scale, except for IRDIS H-band, which is logarithmic.