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Author Topic: Why such a low, low light score?  (Read 3004 times)


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Why such a low, low light score?
« on: October 11, 2013, 07:55:48 pm »
I have a 40D, very old camera, apparently with a score about 700 points for the low light capabilities, and yet, 70D with about 3.5, maybe 4 stops better in low light has 926, only around 200 points over 40D, a little more than 30% in ISO performance. How is that possible?  Another comparison is between its main competitor, Nikon D7100, Canon 70D being a tad better, and yet, the score doesn't relate to the reality. OK, Nikon has better DR, but I'm only talking about noise in the images.
« Last Edit: October 11, 2013, 08:02:05 pm by cris_kty »

Offline Emilie_DxOMark

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Re: Why such a low, low light score?
« Reply #1 on: October 15, 2013, 07:56:58 am »

Thanks for your question. The first thing to say would be that the main improvement maybe explained by the raw convertion.
So if you compare RGB picture made by the final canon ISP versus the RGB picture made by the 6 years old canon ISP available on the 40D there will be more than 2 or 3 stops of difference…
But if you are only checking RAW measurement, differences are not so huge.
Here is the comparison Canon EOS 40D vs Canon EOS 70D vs Nikon D7100:|0/%28brand%29/Canon/%28appareil2%29/865|0/%28brand2%29/Nikon/%28appareil3%29/180|0/%28brand3%29/Canon
The difference is more close to 1/3 of Stop : the sensor of the D7100 is close to 1/3 Stop better than the 70D sensor which is around 1/3 of a stop better.

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The DxOMark team