Flip-out screens can be useful for tricky shots.
2.Has a built-in focus motor
The focus motor moves the lens in order to autofocus. For system cameras, having a focus motor in the camera's body allows you to use a wide range of lenses, including lenses which do not have their own focus motor. For compact cameras, a focus motor is usually built-in.
A hot shoe can be used to attach an external flash, as well as light meters, viewfinders, rangefinders and other attachments.
A system camera has many interchangeable components such as lenses, flashes, and other accessories. System cameras offer greater flexibility than compact cameras.
You can operate the device easily, by pressing the screen with your fingers.
A flash is good for low-light environments, and can sometimes be used as flashlight.