Amplitude versus spatial scales for the APEX/LABOCA (red), original Planck/HFI (blue), corrected Planck/HFI (green) and the combined dataset (black). The vertical lines indicate the centre and the effective width of the Butterworth filter used to combine both visibility sets. The dashed grey lines indicate the visibility amplitudes of the normalised LABOCA and Planck/HFI beams (scaled to a peak amplitude of 1000 for better visualisation).