Eugene F. Lally of the Jet Propulsion Laboratory published the first description of how to produce still photos in a digital domain using a mosaic photosensor. The concept included camera design elements foreshadowing the first digital camera. Texas Instruments designed a filmless analog camera in 1972, but it is not known whether it was ever built. The first recorded attempt at building a digital camera was in 1975 by Steven Sasson, an engineer at Eastman Kodak. It used the then-new solid-state CCD image sensor chips developed by Fairchild Semiconductor in 1973. http://en.wikipedia.org/wiki/Digital_cameras#Early_development
Two good things of a digital camera are to take pictures of moments to remeber and also when it was first built it was used to provide onboard navigation information to astronauts during missions to planets.
http://en.wikipedia.org/wiki/Digital_cameras#Early_development
One drawback is the difficulty to learn how to work the camera and get the perfect pictures.
I have a digital camera and I use it to take pictures for fun or specail occasions.
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