Optical System: NIKON120cm F.L. f/12 achromatic objective in
                            a folded refractor (two 1/8 wave fold flats)
  Digital composite of 4 frames on Kodachrome 25:
                            0.01s, 0.04s, 0.18s, and 0.28s.
  Automated exposure sequencing with UMBRAPHILE 2.2.2