As promised some samples of ISO noise of 40D (10M sensor) vs 20D (8M sensor).
Target was a wildly out of focus gray card so all we are seeing is sensor noise.
Same lens used.
Same room light source.
manual exposure.
Same shutter speed for all shots 1/15 Sec.
Same f stop used for each pair. f2.8, f4 and f5.6
Bodies at same room temperature.
40D was set to faithful and 20D set to parameter 2
The images are screen grabs at 200% to make the noise visible.
The only image processing was a 100% crop from the centre.
Generally they have managed to keep the noise levels on par despite the reduced pixel size of the 40D.
The thing I like about the newer models is that you can eek up the ISO in 1/3 or 1/2 stop increments compared to the 1 stop jumps of the 20D.
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__________________
Rob
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Last edited by robski; 26-07-11 at 22:34.
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