Jman13 wrote:
There are non stacked sensors that can do this, but, there aren’t any 67MP and higher resolution sensors that can do this at full frame (or larger) sizes. Again, just because another solution is theoretically possible doesn’t invalidate the use of their solution for this purpose.
They used it to read dual gain information and increase DR.
jwpstl wrote: Alan Parker wrote: Steve Spencer wrote:
This looks like a great camera, but I don't think it will be an A1 II killer.
Sony created a fairly strange situation for themselves and this camera by making it a stacked sensor, when it maybe didn't need to be.
I don't know what problem they solved by making it stacked but then still too slow for most sports or BIF.
A stacked sensor isn't required for a DGO implementation, particularly one that is limited to a mechanical/EFCS shutter.
It's a lot harder to do with a non-stacked sensor, particularly if the readout is 100ms like the A7RV...makes it very difficult / impossible to do it when shooting at 10fps mechanical like this can too. I didn't say it was the only way it could be done, just that this is what Sony is doing with this sensor.
Many sensors have improved readout speeds without requiring stacked logic, for example many of Canon's R models. A little known secret is that both stacked and non-stacked sensors use the same method to improve readout speeds - by increasing the number of rows read out in parallel. The only difference is that stacked sensors move that additional parallel data faster off the sensor, which is why they achieve materially higher readout speeds vs sensors using the same technique but offloading the data over slower, non-stacked DRAM interfaces. The takeaway is that non-stacked sensors are fast enough to support a DGO implementation.
The 44MP non-stacked sensor in the S1RII has a 14-bit readout speed of 37ms (1/27). 67MP / 44MP = 1.52 more pixels on the A7rVI vs S1RII, so 37ms * 1.52 more pixels translates to a 67MP equivalent readout rate of 56.39ms (1/17), which means current, non-stacked sensor tech is fast enough to support DGO on a 67MP sensor with 10fps.
This doesn't invalidate the notion the A7RVI is using a stacked sensor in some manner to facilitate its DGO implementation, but it does demonstrate that a stacked sensor isn't required to do so.
May 13, 2026 at 01:33 PM
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