Orion stayed relatively clear for a LONG time, but ALL subs came back with harsh red tones - obviously smoke. Most of the time I was out, Pleiades was totally invisible. Eta Carinae was washed out.
Here's Barnard 33 "Horse-head Nebula" - see if you can spot B33
) The Flame and the nebulosity around one star is visible.
For ghits and srins, I stacked all my photos... ended up with a nice image of Alnitak with a touch of flame