“As with most industries producing consumer goods, digital camera companies will often make the most of their investment in research and development by launching several very similar models, reusing the same basic design and sharing most of their components and features, but differing in a few details to produce a range of distinct products. Sometimes the result can be surprising. For example the Panasonic TZ3 differs from the TZ2 only in the size of the monitor screen and an extra megapixel of resolution, but the result is a significantly better camera. However sometimes the surprise works the other way. Samsung has two very similar cameras in the 8.1-megapixel NV8 and today’s camera, the 10.1-megapixel NV15, but in this case adding more megapixels has not produced the desired effect.”