First i used the Olympus EM1X camera with the Olympus ED 60mm ƒ2.8 Macro (120mm) - together with the highest tripod based pixel-shift setting (80 MP).

Olympus EM1X Pixelshift

I didn't like the 80 MP pixelshift results from the Olympus EM1X I - at all.

Sharpness ? More details ? Forget it. Doesn't even come close to the 50 MP results from the Fujifilm GFX 50s II.

I felt it wasn't really sharp in the 80 MP pixelshift setting. In fact, I have never liked the Pixelshift quality that came out of the Olympus EM1X camera. I only used it for 20 MP, in order to reduce noise, in which it was extremely effective to do so. But resolution wise, i never saw any benefit in the 50 MP or 80 MP files. Ever !

Maybe it was my particular model, that didn't hold up. I don't know. But i could never see any true benefit from the Pixelshift, other than getting huge files. But not more resolution or details. So, I skipped using it.

OM System OM-1 Pixelshift

Now we are talking.

Here the 80 MP Pixel-Shift setting showed a lot better output in sharpness an quality. I use the same tiny Olympus ED 60mm ƒ2.8 Macro lens (at ƒ9) which might be a notch too much.

Also; I have not tested it with the ED 90/3.5 IS PRO Macro lens yet, because the VALOI 120 has restriction of how long Macro lenses can be. But I will give it a try at a later time.

Sharpness wise i felt that the 80 MP was comparable with a native 40 MP resolution image. It did not quite match the sharpness of Fujifilm GFX + Tamron / Sigma Macro. But the difference was less with OM-1 compared to EM1X.

I can't say that I am a fan of this "Pixelshift" technology, really. TO me it feels like "empty enlargement" mostly. I still feel it doesn't truly resolve the promise of much finer details. I also have seen similar in other cameras with "Pixelshift", and didn't fully convince me of being that great.

But, for scanning negatives, the OM-1 did a clearly better job, compared to the Olympus EM1X. I am actually not sure if it is my specific EM1X body that is a bit underwhelming there, or if it is generally a lackluster with Pixelshift in the Olympus EM1X

The Fujifilm GFX 50s II + Tamron 90mm lens still had a clear edge in terms of micro sharpness. It was just plain sharp you know. Yet, the difference was relatively marginal when you consider the bigger picture of a scanned film negative image (ISO film film) at 70-80 MP. I would think that an ISO 25 film negative would show difference between the cameras more clesarly - but not with ISO 400 film negative, or any color negative.

A film negative scanned with a very good flatbed scanner, on the other hand would loose directly, looking way more fuzzy in comparison to the output i got from the Olympus OM-1 with 80 MP pixelshift.

But, let's not chase little grains at nanometer scale.

Recommended for 6x7 Black & White Negatives, ?
I would say yes, it works well.

If you have an Olympus / OM System OM-1 camera, then be my guest - go for it. It works to scan 6x7 negatives with 80 MP pixel-shift.

This now eliminates for me the need of buying a special Macro lens for the Fujifilm GFX camera (the Tamron SP 90/2.8 VC (F017) lens with EF-mount.

I mean I can still ponder about a good Macro lens for the Fujifilm GFX especially for Macro work outside of scanning negatives, I mean.

It did solve my scanner requirements

This solution did actually solve my most important requirements: A macro lens, that does NOT vignette, and does NOT extend physically when changing focus, and is sharp enough to resolve a 6x7 negative beautifully and being above 25 MP in effective size.

Therefore it works to use the Olympus OM-1 + Macro lens together with the big VALOI 120 scanning device for mediumformat film negatives.