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Do you know the model/brand of the eyepiece that was ghosting?
I sometimes get ghosting when viewing the Moon with my less expensive binoculars. this is due to internal reflections. But have never experienced that with Saturn.
The ghosting you saw may have actually been the moon throwing stray light in from the side of the eyepiece. I know I have had ghosts in my view which went away if I covered my head/eyepiece with a hood, or shielded it from the side where there was a ground light.
Just some thoughts that might help.
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