Olympus E-P1 Digital Camera Review$499.99
The noise levels at ISO 100 and 200 are about what we've seen with other Four Thirds and Micro Four Thirds cameras, but the rapid escalation that starts at ISO 800 is more severe than competitive models we've tested.
We look at levels for each of the component parts of the overall noise: red, green, blue, yellow and luma (gray). If one of these components is significantly higher than the others it can create noticeable problems, but that's not the case here.
Turning noise reduction off provides the highest level of detail ordinarily, though with the E-P1 the level of noise this produces will obscure whatever detail lurks among the speckles anyway. More on how we test noise.
Available ISOs range from 100-6400, which can be to set 1/3 EV or 1 EV increments. ISO bracketing is available, an unusual feature and one that comes in handy when shooting with a relatively noisy camera and trying to see how much sensitivity you can get away with. ISO bracketing saves three versions of a single exposure, one below the set value, one above, with increments of 0.3 EV, 0,7 EV or 1 EV.
There is an Auto ISO system which can be set with a default value (to be used if it allows an acceptable exposure) and an upper limit, so you can avoid overly high settings when shooting with Auto ISO.