Sony updated their CMOS Image Sensors for Consumer Cameras and it now includes the 26mp BSI Fujifilm X-T3 sensor the IMX571. You might be able to find some additional details through Sony’s semiconductor page, but this update also makes me wonder about other APS-C cameras that might be coming out in the near future. The IMX271 could be used in a camera like the Sony a7000 and the new MFT sensors could be used in future Olympus/Panasonic bodies.
The page also shows the new Fujifilm GFX100S sensor the IMX461, which has a pixel pitch that matches the Fujifilm X-T3 now.
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Fujifilm X-T3: B&H Photo / Amazon / Adorama
Fujifilm X-T3 + 18-55mm: B&H Photo / Amazon / Adorama