Loving the Horsehead Charles
Here's my efforts to date... first one is a 2 minute exposure with the unmodded camera, in the Spring as before, and then the second is a 1 minute exposure with the modded camera. Looking at the raw file histograms in DPP the modded peaks are just behind the unmodded shot - I'm talking about the green and blue channels, the red in the modded is way out in front
The red nebulosity is much more pronounced and better defined, but if you look closely you'll see some of the fainter stars are harder to discern/not present in the shorter exposure (unsurprisingly). There's more noise in the modded shot simply because it was a hot night.