Funny thing is I started at 5 min exposures ISO 400 for Ghost of Jupiter but found the image exposure too much....the core was burnt out. I then went back to 3 min which was too little.
By then I was having some image/mount drift problems. The stars became slightly elongated. The target was quite low in altitude which probably didn't help.
After lots of mucking around and trying differing times I bugged out & went onto Centaurus A, refocus & re-balanced scope etc. It was ok after that.
I really need to spend a dedicated night on NGC3242 maybe I'll re-try when it's a little higher.
