I tried registering OSC data taken with the 80mm last year and Ha & O3 data taken with the 150mm last week.
Completely different fields of view.
As the PC was chunking away, I did see the process ' Laplace transformation' go past.
That man was a genius.
The attached OSC image is a crop.
Why not
Stats:
80mm OSC data: About 60 X 180s
150mm Ha & O3: About 30 X 300s