Anybody tried the GH5 with 8mm fisheye and 3.5 wide angle port?

I recall a discussion started by Dr Mustard asserting the 3.5” port was good for WAM in MFT but can’t find it.

Has anyone tried this lens port on the GH5 and knows if and how much it vignettes?

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So...it works fine in 3:2 aspect ratio

In 4:3 my set up vignettes on the two bottom corners...

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