Dumbbell Nebula: as imaged in the g and Hα bands (upper and lower panels, respectively). The g image includes the strong [O III] 495.9, 500.7 nm lines. The cutouts are taken from the same corner of CCD #2 in runs r-477762 and r-1241402, picked for having well-matched seeing (respectively 1.31 and 1.25 arcsec). The colour scales used are capped at 1250 counts for g and 5000 counts for Hα to match the ratio of their exposure times. They run from black at background level up through green/magenta/red to yellow at the bright end. This PN has a diameter of approximately 6 arcmin. North is up, east to the left.