The single lens reflex camera contains a number of mirrors through which you can easily adjust your focus. It also allows you to view your depth of focus, making the camera perfect for portrait and action photography. They also have faster shutter speeds, which allows you to shoot with faster apertures in daylight. In addition, these cameras are more popular and more widely available in a wide variety, so you always have a lot of choice.
You can avail a wide variety of interchangeable lenses and their versatility is what makes them ideal for professional photographers. However, the con of the mirror is that it does make the camera heavy and louder than average and adds some shake to It., making tripods essential.