Lee Saxon wrote:
The more interesting thing about the readout speed of this sensor architecture is that if Sony got the readout time down this much vs the A7r5 without even adding on-die RAM, how much more is it capable of with a more robust (if expensive) processing pipeline? Image if this thing could be used to make a ~114mp GFX camera that does enough AF calculations per second for the face/eye detect to not be trash.
This can be calculated today. The A7RVI has readout rate of 2,944 ns/row, compared to the A1/Z9 rate of 678ns/row, which puts the A1/Z9's readout at 4.3x faster, which means stacked DRAM is increasing the readout rate at 4.33x based on these measurements, which matches Sony's claims about stacked DRAM when they first introduced the technology in smartphone sensors:
"As a result, the product is capable of reading one still image of 19.3 million pixels in only 1/120 of a second (approximately 4x faster than conventional products), thereby supporting high-speed image capture." (source).
May 19, 2026 at 09:33 AM
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