These are 100 percent crops from our test scene. Subjects look sharp with fine detail good enough for large prints up to 11.5x15. Things look slightly softer as noise reduction increases as you go up in sensitivity, but it isn't until you reach ISO 800 that subjects lose significant detail and look a little smeary at smaller sizes on screen or in prints.
ISO 1600 is OK for Web use, but colors look muddy. The highest sensitivities--ISO 3200 and ISO 6400--really aren't usable. That's unfortunate because once this camera's lens is fully extended, they would be helpful.
Taking a closer look, things appear more like a painting than a photo, but at small sizes, they're usable, even if you heavily crop.
Photo quality aside, one of the nicer features of the P510 is the capability to set a starting focal length when you turn the camera on.