We realized that were only looking at this cluster through Napoleon, our 16" DOB, on the night of the new moon, since Alexander (the 20" Planewave) had indigestion.
The nebulosity that you have so admirably captured, and of which we were unaware, must be faint compared with Eta or Gabriela Mistral, for example, which are really obvious in Napoleon.
Well done on several counts!
