I was intending to get some imaging of the horsehead as it was a very dark night and relatively good seeing (for the time), but on the test shots there was a, a, thing with a rainbow effect.
First thought was to clean everything.
so i did, cleaned all glass on scope Pflat and dslr.
put it back together and ended up with exactly the same thing.
So I took these high iso and over exposed shots to reveal the anomaly and I rotated the camera only to find it disappeared.
Next i repositioned it a bit to move it to the center and it disappeared, so i moved it away from the rainbow and found it to move with the image.
I found it moves with the sky, not the camera, so what the hell is it.
the shots attached are hi exposures to show it up, the good looking one is a stacked version of it.
i tried shooting other objects like the orion nebula as well and nothing, all fine,
but every time i came back to the HH nebula so did the anomaly
There is also some rings that appear off the the side as well
any advice would be appreciated