From the OP. How do we relate AF/AE calculations per second to sensor readout rate? The Z9 sensor has been reported to have a 4ms read time (Nikon Rumors, Z9 Specifications, Update 2). Thom says some say that read speed is 4.2ms. I have not seen Nikon publish this read speed - they do say the new Z9 sensor has the “worlds fastest scanning speed” with a footnote (Nikon USA reference below). I have seen this read speed related to shutter speed and sync speeds.. not to AF/AE speed.
Nikon says the Z9 handles 120 AF/AE calculations per second - between the lens and camera through the Z mount.
I don’t recall seeing these measures reported for earlier Z models.
Nikon does say - as for the EXPEED 7, “10x faster than previous generations” - that the new Z9 sensor provides, “12x faster data readout than the acclaimed Z 7II”
I don’t know how to readily relate 120 AF/AE calculations per second to the Z 6ii/7ii? All I can point to is the fps rates with AF/AE active.
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Nikon says the Z9 handles 120 AF/AE calculations per second - between the lens and camera through the Z mount.
I don’t recall seeing these measures reported for earlier Z models.
Nikon does say - as for the EXPEED 7, “10x faster than previous generations” - that the new Z9 sensor provides, “12x faster data readout than the acclaimed Z 7II”
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I don’t know how to readily relate 120 AF/AE calculations per second to the Z 6ii/7ii? All I can point to is the fps rates with AF/AE active.