ISO comparison
These are 100 percent crops of photos taken of our test scene. Even at its lowest ISO, the WX50's photos aren't particularly sharp and they really can't be used for much at full size because subjects just look soft and painterly. Basically, you won't want to do any enlarging and heavy cropping. However, that can be said about the majority of sub-$200 cameras and in general the WX50's shots are excellent at smaller sizes up to ISO 400 and can be printed up to 13x9.
Noise reduction kicks in more at ISO 800, though, which smears details and dulls colors some. There's a noticeable increase in noise and noise reduction at ISO 1600 and ISO 3200, making colors look more washed-out and subjects appear even more painterly; you'll probably want to reserve these two highest sensitivities for emergencies when you need to shoot in low-light conditions or get a faster shutter speed regardless of the results. Forget about using ISO 6400 and ISO 12800; I'm pretty sure they're included just for marketing purposes.