Spatially resolved images of NGC 300. Top left: B-band image of NGC 300 with concentric annuli of 36 arcsec width. Top right: Dust mass surface density of the whole disk. Bottom left: S/N map corresponding to the lowest S/N of all the observed fluxes in each pixel. Bottom right: Total 350 μm flux of pixels having an S / N greater than 2 in the 350 μm band divided by the total 350 μm flux of the pixels with low S/N in all bands for each ring.