I spent the last few nights doing a two panel mosaic of M78 and assembled them in pixinsight today using the gradient merge tool, which worked a treat.
I need to re-do the calibrations for summer as the camera can't hold -25C overnight.
These are LRGB images with about 35 5 minute subs per filter over two panels, so about 280 all up. Each channel was mosaiced individually and the channel combination done afterwards.
Happy with the blend, but there's a lot of noise still in there and I keep forgetting what a tricky damn object this is to image!
Higher res on astrobin at
https://www.astrobin.com/327265/
cheers!
Andrew.