This page shows a noise series for ISO 100/800/1600/3200/6400/12800 to show real world differences. As with the other examples, all noise reduction was disabled except for long exposure noise reduction.
Note also that detailed images like this one tend to hide noise, making it less apparent. Images with continuous tones, saturated primary colors, etc can make noise look much worse than it will here. For example, see the Kitchen Counter example and examine the red tomatoes.
The image was processed with white balance of Shade. All exposures were also “pushed” with 2/3 stop exposure compensation, except for the ISO 12800 exposure, which was pushed 1 full stop due to inadvertent 1/3 stop underexposure, making closer to ISO 17000. No further adjustments were made.
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