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The S3100 looks almost identical the S3000. The logo's in a different place and the buttons on the rear are a slightly different shape. But, otherwise, you'd be hard-pressed to tell the two apart.
Perhaps that's why Nikon has chosen to distinguish the S3100 by producing it in a range of impressively gaudy colours. Our review unit came in a spectacular morning-after-the-night-before yellow. You can also pick it up in blue, pink, black, red, silver and purple versions.
The design itself is pretty smart, which is possibly why Nikon hasn't changed it too much. The S3100 is very slim and light, and it feels balanced in the hand. The buttons are well placed, while the ports and sockets are well protected but easily accessible.
At 2.7 inches, the LCD display isn't massive by modern standards. With 230,000 pixels, it also has a fairly low resolution. Still, it's adequate for lining up shots and the user interface is nifty.
Internally, the S3100 offers a few notable enhancements over its predecessor. For a start, it has a resolution of 14 megapixels, rather than 12 -- not that more megapixels necessarily make for better pictures. The optical zoom has also been increased to 5x from 4x, while high-definition 720p video-recording capability is now offered as well.
We've seen the majority of the camera's other features before, although that's not to belittle their usefulness. The blink-detection, smile-detection, red-eye-fix and skin-softening features, for example, can all be employed to help you take a decent portrait shot. The subject-tracking function will also attempt to maintain the focus on a designated target, even if it's on the move.
All of these features are selectable via a single button on the rear, along with further scene modes, so there's very little faff involved. The camera offers an anti-blur function too, although the vibration reduction is of the electronic variety, which isn't as effective as optical image stabilisation.
Out and about, the S3100 is simple to use. Press the power button and it's ready to go in just over a second.
In terms of performance, though, the camera is fairly average for a device of its price. A significant number of our test shots were slightly blurred, in spite of the evenly lit environment we took them in and the camera's own vibration-reduction system.
As you can see from our images, the S3100's colour reproduction is dramatic but not unrealistic. We found, however, that skin tones can look somewhat unnatural in certain lighting conditions, even with the full auto functions engaged.
Fringing is evident too, although, admittedly, it's no more of an issue than it is with many other compacts we've seen. We were more disappointed by the overall lack of sharpness and detail. Take a look at our photo of the bluebells and you'll see that, while there's relatively little picture noise at an ISO setting of 320, the picture lacks definition, even in the area of foreground focus.
It's our job to be picky, however, and some of these criticisms may not even be an issue for many casual users. But we have to say that, while the S3100 is by no means the worst performer we've seen, we've definitely found it easier to get good results with other models in its class. It's also not the cheapest camera of its type, so we'd recommend weighing up its small size and portability against its cost and image quality.
The Nikon Coolpix S3100 is a pretty good camera, but, considering what's on offer, it's on the pricey side. If you're considering buying the S3100, we'd suggest you try to pick up the S3000 instead. It's virtually the same camera and can now be found online for about half the price.
Edited by Charles Kloet