Many thanks all.
Yes its some sort of internal reflection, I havent worked out where its coming from as yet, wether from the coma corrector, uhcs filter, or in the camera itself Im not sure. when the moons up I might do some experements with and without those items and see if the reflection remains.
Ive always wanted to catch this little nebula, when the weather finally fully clears I would like to spend an hour on this object, not just 15 mins
But yes I could do with some more clear sky hehehehe.
Havent got flat fielding worked out with Iris as yet, when I divided by flat field with this shot it introduced more noise, not something we want
