Originally posted by Xatnep_CJ Hey guys,
this time you played a little trick, I must say.
The RAW file is about one f-stop overexposed which makes it an ISO 25600. As we have learnt during the last days the K-5 produces high ISOs by pushing ISO 1600 underexposed images. So by overexposing an ISO 51200 by one f-stop the result is more or less the same an exposing an ISO 25600 correctly. This should also have an influence on the noise level.
I would be verry happy if you convince I am wrong.
It you are basing your conclusion that the shot was overexposed on the +1 EV exposure compensation, I have to disagree with you. Exposure compensation is used to modify the exposure that the meter chose, resulting in an adjustment to shutter speed or aperture, or both. If the resulting exposure, which is determined only by shutter speed and aperture, does not lose significant highlights, the photo is not overexposed. The photographer could just as well have used manual exposure to choose the same settings.
In high-ISO photos, the problem is not the high ISO. It is too little light. Increasing exposure to get as much light to the sensor as possible, i.e., exposing to the right, while avoiding blown highlights, is the right strategy, because it increases the signal-to-noise ratio.