What use are Megapixels to a genealogist?

There is no doubt that using a digital camera is a boon to all researchers and particularly to those doing genealogical research. A survey in 2006 of professional photographers showed that over 80 percent were using digital cameras as opposed to film. That trend has undoubtedly continued. Genealogists benefit from this transition to digital cameras because you can use your camera to record information directly from books, microfilm and onsite visits, such as those to cemeteries. In years past, the biggest obstacle to taking photographs was the expense of purchasing film and the time it took for development. In today's world digital cameras are everywhere, including embedded in cell phones and other devices.

This holiday season it is likely that you are considering the purchase of a digital camera. In looking at the ads online and elsewhere, you will almost always see the number of "Megapixels" prominently displayed. The average inexpensive camera today comes with 10 or more Megapixels. But what does that mean? And is more always better?
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