M1-16 Image of the proto-planetray nebula M1-16. Narrow band filter 1-0 S(1) 120 sec per exposure. Background limited 3 x 3 mosaic with 20 arcsec jitter, repeated twice. Test of background noise limited operation with narrow band filters. Considerable structure in the S(1) emission is seen, delineating shock regions and probably the NW and SE walls of a cavity (faint curved arcs). Data taken at the request of Colin Aspin. Courtesy of Phil Puxley. Royal Observatory Edinburgh Rob Ivison, 15th Nov 1994. rji@roe.ac.uk