These are 100 percent crops of our test scene. The Nikon Coolpix L830 basically has the same photo quality as its predecessor, the L820. Photos are best at and below ISO 200. As the sensitivity increases, so does noise and smeary details from noise reduction. Also, colors appear slightly washed-out and muddy from noise at ISO 800 and above.
What this means is in daylight conditions, you'll get very nice photos that are good for larger prints up to 8x10 or slightly larger. You won't want to enlarge or crop too heavily on shots above ISO 400 just because of the lack of detail and artifacts. However, for online use at smaller sizes, they'll be fine.
This picture as well as those that follow are available for download to view at 100 percent. These are large files, though, so they may take a few seconds to open. All were taken at ISO 125 unless otherwise noted.