Continuum image obtained from combining only our band 7 and 8 observations of T CrB where we achieve the best angular resolution. The two magenta circles represent the boundaries of an annulus around the position of T CrB with inner radius 0.8 arcsec (twice the angular resolution of the observation) and outer radius 1.6 arcsec, inside which we derive an upper limit on diffuse emission in the circumbinary medium.