I found this nifty illustration the other day, explaining the relation between the Fujifilm GFX image sensor size, with various shift position - and perhaps even more informative; a couple of image circles from various lenses !

As you can see the Mamiya SHIFT Sekor Z 75mm ƒ4.5 lens [black filled circle] - has a huge image circle of 124 mm (12,4 cm). No wonder I was able to shift all the way each sides extreme, in order to create panoramic images when stitching three segments together. As done in the below diary pages.

• Page 52 (daytime),
• Page 53 (sunset)
• Page 54 (twilight)

Naturally, the native Fujifilm GF lenses have the smallest image circle of just 55mm. They are made for covering the GFX 33x44 mm sensor.

The Red filled area shows you what a 6x6 lens covers - allowing you to shift (if you have such an adapter that allows it). Then stitching the image parts together into a larger (wider) image. The Mamiya Sekor Z lenses (RZ67) have a larger image circle than 6x6 lenses. I actually suspect that the Mamiya 6x7 lenses by design have a slightly larger image circle than Pentax 6x7 lenses.

As i remember, that for the Mamiya RB system, Mamiya created later an additional, larger 6x8 negative rollfilm holder. That meant that the lenses covered already a larger than 6x7 negative format.

Vertex 7x7 cm size ain't shown

What isn't show in this the above illustration - is the size that results from using the rotating VERTEX method, resulting into a whopping (equivalent) 7x7 cm sensor size. Albeit it should fit within the Black filled area still.

The main photo of the glittering star was created with help of the rotating Vertex method, at wide open aperture ƒ2.4 on the Pentax 67 Takumar 105mm lens (with two extension tubes added in order to get close), mounted on the Fujifilm GFX 50s II camera.