My first light with this camera and I have a gradient that appears in my LRGB masters (36x300sec light frames). This was taken with a 10" RCX 2400mm FL.
This is a stretched master flat:
The noticeable dust donut on the lower left seems to be for the most part removed accept for when over stretched. I circled the donut in this image:
I used an ADU count of 32000 for my flats. I'm leaning towards an internal reflection causing this issue. I made a test image with an HA filter and I don't have this issue. I can remove the gradient when processing:
Does this look like a flats issue? Looking for some words of wisdom.
Pete
