SLR stands for single lens reflex. This type of camera is viewed in esteemed light by professional and student photographers because it allows for total control over the outcome of the photograph. Professionals love the fact that you can control focus, metering and the zoom of the lens, while point and shoot camera users will most likely find this aspect frustrating the first time around. SLR cameras have a very large depth of field, which means you can stand up to 20 ft away from a subject and still get a great shot. The best names in SLR are Canon and Nikon, but Pentax, Olympus and Sony are also great cameras for first timers and professionals alike. Here are the advantages and disadvantages of purchasing an SLR camera.Advantages• Wide aperture ranges: You can use these cameras in a vari