The single lens reflex (SLR) camera is most photographers idea of a serious camera. SLR means that the same lens is used for viewing and taking pictures. A mirror in the body directs the light from the lens up into a prism for viewing, then flips up out of the way just before an exposure is made. This gives you a good idea of what you are going to capture through the viewfinder.
Though costlier to buy, own and maintain, SLR cameras are more versatile and powerful than regular point and shoot cameras. They provide you with better control over various variables that have a direct bearing on the image quality. Its USP includes accuracy, large and bright optical viewfinder, fast operation and multiple control options, excellent image quality in low ‘available’ light situations when it is necessary to use higher ISO speeds and interchangeable lenses.