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11-08-2010, 09:57 PM   #1
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ISO 100: Expanded vs Native

Is there any real world difference between the expanded (K-x / K-r) and the native (K-7, etc) ISO 100?

And is the expanded ISO 100 perceptibly better that the native ISO 200?

Thanks in advance

11-09-2010, 12:13 AM   #2
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I have not found the expanded 100 ISO any better than shooting a native resolution of 200. It's nice to have if you want to smooth water or wind, but you'll have a difficult time seeing any differences otherwise.
11-09-2010, 01:50 AM   #3
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QuoteOriginally posted by GrinMode Quote
And is the expanded ISO 100 perceptibly better that the native ISO 200?
I don't have the K-x, but according to DxOmark, you get 0.6 EV more DR at ISO 100, so in theory, for "one shot HDR" type images, you have a little more room at ISO 100 (in fact, according to DxO again, ISO 100 DR on the K-x is quite close to ISO 200 on the K-5).
11-09-2010, 02:56 AM   #4
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On my K-x I see quite a lot of difference between ISO100 and 200.

ISO100 is significantly cleaner in the shaddow areas.

11-09-2010, 03:24 AM   #5
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Original Poster
Thanks for all your replies.

I actually compared the K-x, K-r, and K-7 in DXOMark. The expanded 100 scores better than the K-7's native 100.

But I'll just put on record that I'm not bashing the K-7 here, and I'd like to consider what the others are saying about the DXOMark's (in?)significance in real world scenarios.

I had googled about it and I found some info about expanded ISO (the lower range) actually reduces DR. But maybe it does not matter much with the K-x and K-r's very good DR.

I'm still on the fence between a K-7 and K-r

Thanks again.

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