Trying out new filter on Spark

[Fireman Sam]

Got one of those "press on" N.D. filters - this is my result,-

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[spark@2017]

Got one of those "press on" N.D. filters - this is my result,-

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Got one of those "press on" N.D. filters - this is my result,-

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I think there would be better results without a filter.
I have tested my Freewell ND and pole filters and found that Spark provides the best quality without filter.
Here's a video from my Spark without filter:

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[Haggi]

Some claim filters should not be used with Auto exposure, only Manual.
Hopefully some "pro" will chim in with guidance...