What causes stripe noise on a7iii?

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Alantkh Regular Member • Posts: 171
What causes stripe noise on a7iii?
5

A thread on the noise pattern shown in one of the early samples on a7iii.

observations

1) it’s a column defect but it does not spread the entire height of the image

2) there is a overexposed region somewhere along the column

3) the lines are not evenly spaced

it don’t think it has anything to do with reflection or stray light on the phase detection pixels.

I am assuming the sensor uses a column adc and looks like the overexposed region forces the gain of the adc to be set to very Low. That will obviously impact the adc making it more sensitive to noise.

Not sure why the pattern does not extend the entire height ... maybe Sony updates the adc gain constantly and don’t stick to one value throughout the entire column

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