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Sigma DP2 Merrill

Started Aug 23, 2015 | User reviews thread
xpatUSA
xpatUSA Forum Pro • Posts: 23,016
Re: Sigma DP2 Merrill
1

Theelderkeynes wrote:

Almost all the stuff posted here is shot at Iso 320...

https://www.flickr.com/photos/9235496@N02/albums

With all due respect to an Elder, that does not disprove the statement that "Once you go over ISO 200 IQ definitely takes a hit".

Getting theoretical (moi?), if we shoot at ISO 320 and obey what the metering tells us without in-cam exposure correction - we will get a sensor exposure of approx 1200 ADC levels out of 4095. That's a loss of almost 2 EV!

However, we won't notice it because SPP will multiply the image brightness by 3.2 compared to ISO 100. But I, moi, will notice it because the shadow noise will be 3.2 times as bright.

ISO 100 roolz

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Ted

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