Zoom into the 30 GHz temperature map in presence of noise: binned (left), and deconvolved (right). In the top row we show the unsmoothed binned map and the deconvolved map with FWHM = 32′ smoothing. The deconvolved map is distorted by ringing and amplification of noise. In the bottom row we show the same maps smoothed further to FWHM = 45′. The additional smoothing removes the distortion.