I managed to get a further 10 hours to add to the initial 7 hours taken using the Sky 90/M26C array – 20-minute sub-exposures.
I don’t think that the additional 10-hours added much in the way of depth to this image, but it did mean that I didn’t need to use any noise reduction like I had to with the 7-hour image. This is worth remembering for future “marathon” imaging sessions. Probably not worth going beyond the “magic” 8-hours per frame.
