gman1339
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Jammy Straub wrote:
Mark Kenfield wrote:
Jammy Straub wrote:
The D300's got an incredibly low Low Light ISO score at first glance... what's up with that...
Wierd testing.
That was the first thing that struck me.
Yes after looking at it there's something seriously wrong with that value compared to the other cameras.
Perhaps being able to set it to 6400 is skewing the results. But it's rating should be more comparable to the 5D and at least better than the 1D MkII unless there's some really weird non-real world application way they're testing it.
From the testing explanations.
"The SNR indicates how much noise is present in an image compared to the actual information (signal). The higher the SNR value, the better the image looks, because details aren't drowned by noise. SNR strength is given in dB, which is a logarithmic scale: an increase of 6 dB corresponds to doubling the SNR, which equates to half the noise for the same signal.
An SNR value of 30dB reflects an excellent image quality. Low-Light ISO is then the highest ISO setting for the camera such that the SNR reaches this 30dB value while keeping a good dynamic range of 9EVs. As cameras improve, the Low-Light ISO will continuously increase, making this scale open."
It seems logical to me that starting at a base ISO of 200 and extending all the way up to ISO 6400 on a 1.5 crop 12 MP sensor that the D300 would hit this 30dB value at a lower ISO than other sensors.
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