Why exactly do large sensors have more dynamic range

Started 3 months ago | Discussions thread
Erik Kaffehr
Erik Kaffehr Veteran Member • Posts: 5,852
Re: Why exactly do large sensors have more dynamic range
1

HDRI wrote:

JimKasson wrote:

JimKasson wrote:

Full well capacity per unit area has maxxed out at around 3000 electrons per square micrometer (3000 e-/um^2).

So if I understand right , the Z7 sensor tech at MF size would yield higher PDR than GFX at base iso ?

No,

You can deduce that the Z7 has higher SNR at the pixel level.

For PDR, you need to take the readout noise and the pixel count into account. The Z7 has larger pixels which means fewer pixels for any given size.

The easiest way to find out is to check Bill Claffs website and check for the GFX 100 in crooped sensor mode:

Both have maximum PDR around 11.6 EV. The ISO axis is nominal, so the GFX 100 seems to achieve 11.6EV at higher ISO, but that figure is not measured.

https://www.photonstophotos.net/Charts/PDR.htm#FujiFilm%20GFX%20100(FF),Nikon%20Z%207II
This seems a bit like counting the angels on the head of a pin. There are measurable differences, but the major factor is how the photographer exposes.

The winner would be the camera with the best histogram.

Best regards

Erik

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Erik Kaffehr
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