Older lenses

like the ones used for Pentax 6x7 medium format - are still formidable, when you used them in the much larger 6x7 (or 7x7 cm) format they were originally designed for.

That can be done, with the Rhinocam Vertex adapter, in which you take 4 images, each one displaced perpendicularly with the camera on the adapter. Works in a rotation so to speak. Then you stitch the 4 images into one - resulting into a slightly larger image (image circle) compared to the original 6x7 cm large negative format.

When i look at screen resolution... there is plenty of sharpness !

Wouldn't you agree ?

The Vertex adapter

is perhaps the easiest form to achieve true medium format with a digital camera, as it renders the exact lens design and it's larger image circle - down to a digital sensor. Instead of film.

So, it can be done, and it is pretty cool, to be honest.

Portraits with Vertex method

Naturally, when it comes to portraits... it is more difficult to do that - because everything needs to be STILL. The model has to be absolutely still during the time you take those 4 rotated images ! It can be done, as it worked with Sal - but isn't exactly straight forward. In general, portraits taken with just the Fujifilm GFX 50s II straight through (51 MP) - is actually plenty of sharpness.

Who needs really more ?

GFX 50 is more than enough with the Vertex adapter

When using a 51 MP Fujifilm GFX 50s II camera + Vertex adapter, you get around 150 MP, while a GFX 100, results into an equivalent 300 MP mediumformat camera, so to speak. Which is... totally over the top. Not to mention that any future "180-300 MP" camera will be very, very expensive...

I prefer the Fujifilm GFX 50 series, which keeps the final resolution in limits with 150 MP - which already is far more than plenty.