As well as shooting our studio test scene at each camera's lowest sensitivity we also shot it at ISO 800 (or the maximum). As you can see in the 100% crops shown below the *ist DS manages to keep noise levels low although we can see a little noise on the left side of this crop (shadow area). What noise reduction is used by the *ist DS is kept to a minimum and there's about as much image detail here as we saw at lower sensitivities.
