Although it sounds like techno-jargon, its usage is literal in the sense that devices like the Canon Rebel XT 8 MP digital SLR camera use a totally electronic form of communication between the lenses and the camera itself.
If you enjoy flexing your amateur photography muscles for nature shots, sunsets, landscapes, and other artistic endeavors, then a good digital SLR camera with a zoom lens will produce good, frame-quality photographs.
If this makes you nervous, you should know that every digital SLR camera does come equipped with automatic settings, as well as intermediate features that offer increasing levels of control over your images.
However, if you are an advanced photographer working with a SLR camera with interchangeable lenses, then you could opt to add a specialized macro lens and manipulate light sources to snap super shots.
Although generally targeted to advanced photographers, anyone can learn to use these cameras in just a few easy steps and they are quickly giving expensive digital SLR cameras some heavy competition.
Canon's release of the Digital Rebel, the first lightweight affordable digital SLR, allowed amateurs and home users to finally take professional-grade images without spending thousands of dollars.
The main reason many amateur photographers upgrade from their handy compact digital cameras to sophisticated digital SLR versions is because they are tired of dealing with the dreaded lag time.
For serious photographers, the ability to switch lenses, use external flash units and manipulate manual settings makes it imperative to own a digital SLR with all the bells and whistles.
Having a single lens reflex (SLR) camera will go a long way to help you capture details of the moon's surface that you would not be able to with a basic point-and-shoot camera.
You can still achieve a good deal of success with a quality point-and-shoot, however, so don't feel that you absolutely need to invest in an expensive digital SLR setup.