One of the secrets to improving your photography skills is to observe the image on the viewfinder, that is one
of the great advantages of an SLR camera. An SLR camera with an interchangeable lens allows you to use a variety of lenses,
from super-telephoto, super-wide-angle, close-up and shifting lenses. Many functions of some SLR cameras are
automatic, including AE (Auto Exposure) and AF (AutoFocus).
