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Image Quality: Is newer better?

Started Dec 2, 2012 | Discussions thread
Steen Bay Veteran Member • Posts: 7,418
Re: ISO 100... LOL

Dimitri Khoz wrote:

I run NeatImage over G7 and a640 shots, and the difference in IQ between ISO800 G11 and ISO800 G7 is about 1/2 stop.

It is very small difference, especially considering age difference between the cameras.

What's most important for the sensor performance is the QE and the read noise. The QE only increases slowly, but the read noise has been reduced quite a bit. If we compare the G9 and G15 on DxO we can see that "SNR 18%" (mostly determined by the QE) has improved by something like 1/3 stop at low ISOs to app. 2/3 stop at higher ISOs, and the DR (where the read noise is more important) has increased by app. 1.5 to 2 stops across the whole ISO range.

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