Contour plots in [O iii], V band and Hα of the three Sgr PNe. The peak fluxes are scaled to give approximately the same peak value for all [O iii] images. A small constant was subtracted from the StWr 2-21 images to suppress the lowest contour. Contour levels are at 0.5, 1, 2, 4, 8, 12, 16, 24, 28, 32, 36, 40 scaled counts. At the distance of Sgr, 1 arcsec corresponds to 3.9 10¹⁷ cm.