Every digital camera, even your point-and-shoot, has a sensor inside of it. In the simplest of terms, all these sensors do is convert an optical image (light) into an electronic signal which can be read as digital information–an image you download and can see, edit, and share. Your point-and-shoots have tiny, little sensors inside of them and for the most part they do a good job of converting light into digital information you can use–a photograph…Read the rest on Shutterfly.