https://www.filmscanner.info/en/FilmscannerKlassen.html
See the "Drum scanner with photo multiplier technique" section. They say that the 1045ai can resolve around 6000dpi effective, but you have to scan at 12,000dpi nominal.
If you scan at 8000 then you get 4000 effective, which is an overkill anyway, usually, at least for LF or for regular films and lenses.
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