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Canon EOS 7D Digital Camera Review$1,699.99
By default, the 7D is set for the Standard High ISO noise reduction setting, which falls between Low and Strong. As shown in the chart below, the system makes a major difference in noise performance at ISO 1600 and beyond. Of course, the stronger the noise reduction, the more detail is lost in your final images, though as shown in the Sample Photos section, even the more aggressive setting doesn't obliterate fine lines too badly. More on how we test noise.
The standard ISO range is 100-6400, with an extended H setting corresponding to ISO 12800. There's an Auto ISO mode (used when shooting in autoexposure mode or selectable by the user), with a range of settings from ISO 100-3200.