  The design and first use of the Manchester occulting mask imager (MOMI) is
described. This device, when combined with the Cassegrain or Ritchey-Chretien
foci of large telescopes, is dedicated to the imagery of faint line emission
regions around bright central sources.
  Initial observations, with MOMI on the Nordic Optical telescope (NOT), of the
V=4.8 mag P~Cygni environment, have revealed a $\geq$~5~arcmin long [NII] 6584A
emitting filament projecting from the outer nebular shell of this luminous blue
variable (LBV) star. The presence of a mono-polar lobe older than both the
inner (22 arcsec diameter) and outer (1.6 arcmin diameter) shells is suggested.
