Comparison of DSO images in the a) Ks- (13.2 mas pixel scale) and b) L′-band (27 mas pixel scale). The image section size is 1′′ × 1′′. In c) and d) a Gaussian of 98 mas FWHM and a PSF from the image have been scaled to the DSO peak brightness and subtracted at its position. An astrometric grid of red circles marks some bright stars that can be used as positional references to compare the images at different wavelengths.