Photographic Dynamic Range (PDR) is a More Useful Measure than the DxOMark Landscape Score

Started Apr 17, 2015 | Discussions thread
OP bclaff Veteran Member • Posts: 8,680
Re: Clarification - Read Noise and Engineering Dynamic Range

Horshack wrote:

here are two A7s images for thought - at their full native resolution - one at ISO 100 and the other at 409600 - at the same relative exposure. According to DxO the A7s has 5.76DR @ ISO 409,600 (normalized to 8MP) vs your PDR measurement of 0.93. Looking at the ISO 409,600 image do you believe we cannot discern > 1EV of DR in it?

A7s ISO 100 4 seconds

A7s ISO 409,600 1/1000

I get two 0 byte images from those links

In any case, I would want to see the raw files since because of tone curve considerations I cannot discern raw levels from jpg files.

Regards,

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