Sony general manager Masanori Kishi explained in a BCN interview why the Sony A1II kept the same Sony A1 sensor:
The sensor used in the α1 has a fast readout speed comparable to a global shutter, and has very little image distortion. It was a sensor with high potential to begin with. This time, we improved the image processing algorithm to improve image quality. The α1 II has evolved to be worthy of a new flagship camera.” The sensor had a lot of “room for growth”, so it was reused.
The highlight of this model is the inclusion of AI. By increasing the subject recognition rate, the focus accuracy has been greatly improved.
The journalist from BCNranking added some speculations:
It is said that it is difficult to achieve high pixel count and high image quality with a global shutter, so this may be one of the reasons why it was not used this time. If I were to speculate, for example, resources may have been taken up in the development of a sensor equipped with a global shutter, and there may not have been room for the development of a new sensor to be installed in the α1 II.
I agree that the original Sony A1 sensor was and still is fantastic. The limitations of the Sony A1 were in other aspects, some of which have been addressed with the new A1II (some others, like the lack of 8k60p, have not).
It’s also perfectly normal for Sony to “reuse” previous generation sensors. My own Sony A7rV still uses the 61MP sensor from the older Sony A7rIV released in 2019. I can’t say that this has disappointed me. That said, I’ve never found a Sony sensor to be a limitation in any of their models. If we want to criticize Sony, then we can talk about the high price, the less than spectacular firmware support strategy and so on.
What do you think about my take?
Preorder links:
Sony A1II at BHphoto, Amazon, Adorama, BestBuy, FotoErhardt, FotoKoch, Calumet, WexUK, Clifton, CameraPro. Sony Australia.
Sony 28-70mm f/2.0 GM at BHphoto, Amazon, Adorama, BestBuy, FotoErhardt, Fotokoch, Calumet, WexUK, Clifton, CameraPro. Sony Australia.