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M 42 Combining Multiple Sessions

I decided to experiment with stacking in PixInsight, this time combining different exposure times and different gains on the camera. These pictures of M 42 were taken from my house, and from Lost Dutchman State Park in Arizona.

M 42; 373 subs at 15 and 60 seconds, 60 and 40, gain duo filter; processed in PixInsight; taken from atop Galaxy in my driveway (15 second subs) and Lost Dutchman State Park, Arizona (60 second subs)

M 42; 373 subs at 15 and 60 seconds, 60 and 40, gain duo filter; processed in PixInsight; taken from atop Galaxy in my driveway (15 second subs) and Lost Dutchman State Park, Arizona (60 second subs)

This is using DBE, BlurXTerminator, SyQon Prism Deep, Statistical Stretch, iHDR stretch, and some final touch-up with the curves transformation.