Slide scanners are also available, but they are higher-priced and not as easy to find at work or school. Nowadays, many are using video to publish on the web. This is a great deal if you already have a camcorder and computer, not so great if you have to purchase one just for this purpose. The process is very fast. Lastly, you can shoot several minutes of video, and go back to find precisely the right frame on the tape.
Video is an easy way for someone to get into digital images.
Video itself has a resolution limit of about 640x480, though in practice you do get only 320x240 worth of information. Individual frames have a lot of noise as well, something you don't see when they are in motion. On the down side, most of them are fixed-focus lenses which cannot get close enough to take good fish pictures. We are probably on the verge of a revolution, with high-end digital cameras entering the market that have overcome the problems. At this time, they're still pretty expensive for the consumer.