70D Dynamic Range is actually great, despite what DXOMark says

Started Jan 21, 2014 | Discussions thread
Just another Canon shooter
Just another Canon shooter Veteran Member • Posts: 4,691
Re: 70D Dynamic Range is actually great, despite what DXOMark says

David Hull wrote:

When you measure it, you do not know where it is coming from (but we have additional info indicating what is going on). What Sensorgen does it to model it as additive noise and a multiplicative one, and fit a curve. Then they report the additive noise as "read noise".

He isn't really modeling anything, he is taking the DxO information and presenting it in a different perspective, one which makes it a bit easier to see what is really going on in the camera.

Of course, he is modeling it. Look at the formula here. Those numbers are derived from the DXO data by curve fitting, under some assumptions (there was a recent thread about those assumptions, BTW).

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