
ChipMod took a Nikon D850 camera apart and came to the conclusion that the sensor inside is made by Sony (Google translation):
- In an email, ChipMod informed me that they analyzed the sensor and the bonding pattern together with other characteristics are typical for the way Sony manufactures sensors.
- They also shared with me that Nikon has started to use a new sensor IC package – AQJ (metal frame with mounting holes on the sensor).
- ChipMod also noted that the D850 sensor is different from the sensors found in the Sony a7 II (IMX251AQL) and a7 III cameras in both circuit and packaging.
We had another Nikon D850 sensor teardown last year, but we could not see the actual numbers on the back of the sensor since they were covered by a metal frame. This time ChipMod provided a picture of the back of the sensor where we can clearly see IMX309AQJ and 1183456:

A quick Google search shows us that IMX309AQJ is indeed a Sony made sensor:
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