Canon EOS 500D (Rebel T1i) - Review / Test Report - Sensor Noise
DSLR Reviews - DSLRs

ISO noise

Let's have a look at the results of Canons' 22.3x14.9mm C-MOS sensor with respect to the ISO performance. Let's start with the RAW-converted images:

The EOS 500D is generally a good performer throughout the ISO range. There are no problems at ISO 100/200 and ISO 400 and ISO 800 are also perfectly fine for most scenes. However, at ISO 1600 and ISO 3200 the noise level is starting to have a higher impact but it's still usable in some situations.

Now what about the JPEG results...

If you move your mouse cursor over the image you can switch the corresponding JPEG results, Noise reduction ON and OFF

The JPEG output shows basically a full stop noise advantage at ISO high settings compared to the converted RAW files, but the increasing noise reduction towards high ISO settings comes at cost of resolution and dynamic range - specifically at high ISO settings.

These are the lab results but I guess you're also interested in some samples taken in the real world. The first image series should give you an idea of the color noise at the specific settings.

If you move your mouse cursor over the image you can switch the the corresponding JPEG results

... and another series with a more detailed subject.

If you move your mouse cursor over the image you can switch the the corresponding JPEG results

Verdict:

low ISO noise (ISO 100-200):
mid ISO noise (ISO 400-800):
high ISO noise (ISO 1600-3200):




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