DxOMark's measured ISOs vs. manufacturer ISOs

Started Mar 13, 2013 | Discussions thread
Jeff Charles Veteran Member • Posts: 7,514
Re: DxOMark's measured ISOs vs. manufacturer ISOs

Gordon - Thanks for your incredibly informative posts, as usual.

GordonBGood wrote:

  1. DPR has admitted that the studio light levels aren't always consistent across different cameras nor have attempt been made in the past to keep consistent aperture and shutter speed settings,unlike as Image-Resource sample studio images do. 

DPR not maintaining consistent lighting or exposure does call into question the validity of their ISO tests.

I do not know if IR has changed testing procedures, but in the past, they have varied light levels and/or exposure to equalize output brightness between cameras. I raised the issue in an IR forum thread a few years ago. My post is number 3, and Dave Etchell's response is number 4.

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Jeff
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