FujiAddict published so far the best Fuji GFX 50S sensor size comparison that in addition to the ratio to other sensor sizes also gives you the new Fuji G lens mount as a reference:
- Size: 43.8 × 32.9mm
- Effective pixels: 8256 x 6192
- Various aspect ratios, including 4:3 (default), 3:2, 1:1, 4:5, 6:7 and 6:17
- Flange distance: 26.7mm
- Crop factor: 0.79x
- Sensor "developed by Fujifilm"
- Bayer Array sensor
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