I'm glad there is an ISO 12800 image. It shows how the camera handles such a high ISO and how much their de-noising is mushing up the photo. I can understand why it was shot at 1/800. This allows the shooter to not to worry about setting up a tripod and taking a quick shot to illustrate the high ISO image quality.
Not sure what the point is of this ISO 12800 shot (and the next one), which are shot at slow apertures and rather high shutter speeds… ?
The same issue with the EM-5 gallery (ISO 6400 with 1/4000th shutter on two shots. What is that supposed to show? )
You don't think it shows high-ISO quality?
Noise for a given visual exposure. Contrary to popular believe, the amount of light in a scene doesn't have much influence on noise levels. So the same scene with much less light, same ISO and slower shutterspeed plus larger F stop, would have roughly given the same amount of noise.
It shows ISO 12800 quality. As I wrote for the next picture, what it doesn't show is a situation that needs ISO 12800. This could have been shot at 1/50 second at ISO 800.
@Troj- not true at all, certainly not my experience. My Olympus years old e-300 does very good in ISO 1600 at high noon, horrible (relatively speaking) in low light.
It's not just the low light as a faster lens, slower shutter speed high ISO of a scene requires, but usually when you are shooting within those parameters in the real world the quality of the light itself is bad. Tungsten/fluorescent/sodium, etc vs say full spectrum daylight.
This is why I find this to show high ISO performance pointless, like I said, my e-300 in good light at ISO 1600 does way better than the real world average performance of high ISO would suggest.
@Peksu, Joseph- no, I don't think it does. High ISO in all cameras does better when you have a situation where you are not really in lower light. Remember also noise builds up more the slower the shutter. That's why cameras go into dark frame subtraction mode after a certain threshold.
I honestly don't understand dpreview point in doing this- this is clearly not a low light situation - at least the one I encounter when really needing high iSO- and yes, I do think the image quality is affected as the sensor is stressed more.
This is nonsense. The amount of light hitting the sensor, not the illumination of the scene is what determines the noise. The only reason your daylight pictures look better than low light pictures is because your histogram is not filled properly at low light, and taking into account quite narrow DR at high ISO, every bit counts.