Instructions
Compare the megapixel count for each model. Cameras with low megapixel counts produce smaller images, which means that you can store more images on a memory card. However, enlargements will suffer some loss in quality. More megapixels means a larger image, which means that you can make enlargements with very little loss in picture quality. However, you will be able to store fewer pictures on your memory card, and each image will require more processing and handling time.
Take some test pictures with the camera. One important thing to check is how quickly the shutter reacts to the press of the shutter release. A slower camera can mean that your intended moment may pass by while the camera is working. Also make sure that the controls are easily accessible while shooting. The ability to quickly switch between shooting modes will give you more flexibility.
Examine a finished image from the camera, if possible. This will give you the best example of the lens and processing power of the camera. Look at how well the camera processes highlights and shadows, and see if there is any color fringing along the edges of high contrast areas. Nikon Coolpix cameras use a range of sensor types, and if you will be taking a lot of pictures where there is high contrast or bright sunlight, a model with excessive color fringing may be inconvenient.