RegiStar let me combine two shots, one from Nov 2021 and one from Jan 2021, both taken with my QHY183c camera, but with two different telescopes.   Both were from the same location – a very light polluted metro area, using a Baader UHC-S L-Booster filter.

I am pleased that the UHC-S filter has this much response to blue reflection nebula while keeping out the enormous amount of LP that I have to shoot through here in the city.