The SliderPLUS Camera Stand uses a unique tracking mechanism that allows the rails of the slider to move with the camera when mounted on a tripod. Its compact sizes makes it ideal for travel and it takes of up small room in your camera bag. With traditional sliders, you’re often limited to the amount of dolly in/out range, because the slider itself usually will end up in the shot eventually. But with this slider and with its rails you have twice the amount of dolly in-out range . With the SliderPLUS Camera Stand, the rails are also retracting backwards with the camera.