Have to wait for quite a while, but I will shoot the night away outside trying out all the crazy ISOs my current 30D cannot do...25600, 51200, 102400
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This is some of the reason I don't like the Dxo tests. As it states that the 5d2 is better at noise then athe mk4. Now, if you have tried these cameras you know it's completely wrong. On one hand...
Between 100-800 the 5d kills the mk4... But from 1600 and up the mk4 demolishes the 5d2. So seeing that the 5d shows noise at 1320 something and the mk4 is 1260 or whatever is just to take it way out of contex.....
Very valid question from the OP. And there is different answers...
I think Canon states two stops as being able to shoot at twice and four times the iso. And they claim the same noise at the highest setting being better than two stops down on the 5d2, which could easily be true.
Now take Lightroom in to the equation, Lr3 and the 5d2 vs the 5d3 with Lr4 gives you easily three stops, so "only for jpeg" two stops is only valid with the DPP software...
Yes I am drawing my own conclusions here, and claiming stuff, because it's friday and I'm enjoying a few beers, cheers everybody! Have a good one!
I just downloaded the high ISO images from DPR. All the images were taken at 3EV, so they are real low light images.
On my screen, I could see the noise at ISO 102400, but the 8.5 X 11 prints were sharp and clean. I then printed 3 more, 51200, 25,600, 12800, and they also suprised me. I could show any of these prints to someone, and they would not suspect that they were high ISO unless they had a magnifier.
These were jpegs with no additional processing by me, I would expect RAW to be better.
I certainly plan to use the ISO 25600 freely whenever I absolutely need it in low light for a fast shutter speed.
Canon has done some real work on the blacks, I can move the black slider in LR4 all the way to the right without seeing any banding.
yes they look more then okay!