The Digital camera is a wonderful eletronic device that has answered the long time desire to create instant images. These devices use technology much like traditional video cameras, but have much higher resolution capacity and, because of the number of "pixels" captured, now can surpass the ability of film to reproduce what we see.
Another aspect of the digital camera is its nature of being a computer and its close connection to the computer. With the idea of "digital" images comes the idea of enhancing and otherwise digitally manipulating these images so that they look better, sharper, and are more meaningful.
What's more, digital cameras give us immediate feedback about how good our image is that we just captured of the scene before us. This means that we can judge the quality and success of the image taking process while we are still within the process! You can "preview" your digital images and easily make judgements about whether or not to reshoot the image in a different way. This, of course, was always the disadvantage of film...not knowing if the shot you just made will meet your expectations.
Read chapters 1 and 2 in our book to understand more about digital camera capabilities and some technical concepts about how digital cameras work.
Digtal cameras fall roughly into 3 types: mini/automatic, compact/full-features, and SLR (Single Lens Reflex) or professional models.