Back home seeing Venus hanging in the sky, so I pulled out my 127mm Maksutov to try. Jupiter was not in a good location, otherwise I should have used it for testing.
First one is taken with a 2x barlows, no filter:-
Second one is taken with a 2x barlows, green filter:-
So a green filter will really help to reduce the effect of bad seeing, despite the shutter speed required was much longer with a green filter.
So these are the stacked image, the first one is an average of the blur:
This one is much better:-
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