Iso ratings don't match with Canon...huh ?

Started Nov 3, 2010 | Discussions thread
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jonrobertp
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Iso ratings don't match with Canon...huh ?
Nov 3, 2010

I shot samples at my local store (Henry's) with the D7k at iso 12800, f8 ; and repeated it with the same card/setup with my T2i. The color difference was large..blue/green for Nik and redish for Can. The scene was a cereal box inside a large cardboard box to somewhat darken the scene.

But the Nik image was a lot darker than the Can..by about a stop !! why ? Didn't IR get similiar results ?

I must conclude they measure iso differently. It rather seems the Nik would need to be close to 6400 to get the same brightness same scene/settings as the Canon does at iso 12800. Which is ok...but throws off the higher iso noise claims the Nik seemed to have.
Anybody do this test as well ?

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