DP2m ISO test

Started Aug 14, 2012 | Discussions thread
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HBowman Senior Member • Posts: 1,235
DP2m ISO test

The test is basically done in darkness, the back of my plasma TV at home, in very dim light. I opened in SPP 5.3 and touched nothing. Exported as 16 Bit Tiff Prophoto (my work-flow is in Prophoto). I opened it in LR4 where is reduced 100% Chrominance, and switched directly in B&W without touching anything. Export as JPG sRVB. Photo reduced in a basic free application. I done +0.7 bias to compensate any side effects, all in P mode.

The real scene where the test took place, the back of the TV.

ISO 100

ISO 200

ISO 400

ISO 800

ISO 1600

ISO 3200

ISO 6400

What can I say ? It is good, at least for me The real problems come at 1600 ISO, at a colour point of view. There is a huge break between 800 and 1600 ISO in term of colour rendering and chrominance.

The banding, horizontal in my case, start to be really present at 3200 ISO ... in this very test .

I will investigate more and will chase this banding to find the exact conditions, where and why he is generated at lower ISO.

Sigma DP2
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