This image of M81 and M82 has been put together from LRGB and H-alpha data captured by me, and RGB data from Andrew Luck, collected over the last month or so. It was a bit of a nightmare combining everything, but the end result isn’t too shabby. This is the full resolution image which shows the HII regions in M81 quite nicely.
Last night was clear and moonless, so I took the opportunity to hook up my Atik 460ex OSC to my Equinox ED80 and try a couple of well-known targets. First was the Rosette Nebula in Monoceros. This is a stack of 36 x 5 minute exposures, processed in ImagesPlus:
I then swung the telescope round to Ursa Major to capture this grouping of M81, M82 and NGC3077. It’s put together from 23 x 5 minute exposures.
It’s surprising how much detail this camera can pick up from just 3.5 minutes of exposure, even on a big, bright subject like this one!