I just came back from a photo exhibition. I played with the new Canon 5D mkIII (with 24-70 I and 70-200 II) . I shot some portraits from iso 1600 all the way up to 25600. I was impressed!
Here I uploaded 2 100% crops at iso 1600 and 25600. Sorry for not uploading the whole image but the model (my dad) is not very comfortable about it
I also played with Canon G1X but didn't have an sd card to save the files..
Wow! ISO1600 looks fantastic! ISO 25600 looks great too. Are these based on RAW, or are they just crops of camera JPEG?