The result is that the camera is held more steadily than by hand alone (though not as steadily as when the foot is planted on the ground), and the camera/monopod is completely mobile, travelling with the photographer's movements. This technique is widely used in videography in which the photographer has to move with the subject e.g. first-person scenes, and is also especially useful for disabled photographers. Generally, in terms of mobility versus stability, if mobility increases, stability decreases as follows: Tripod or tablepod resting on a solid surface (most stable) Monopod on solid surface "Chestpod" / "Beltpod" Hand-held (least stable) Monopods are often equipped with a ball swivel, allowing some freedom to pan and tilt the camera while the monopod remains relatively stationary. Walking sticks or "trekking poles" exist that have a 1/4"-20 threaded stud on the top of the handle, usually covered by a cap when not in use, allowing them to double as a camera monopod. The user would usually need to carry a ball swivel adapter separately and mount it as needed. Monopods used with a smartphone or camera to take selfie photographs beyond the normal reach of the arm are known as selfie sticks, and (depending on the model) may have Bluetooth connectivity. Ways of attaching a camera There are two ways to attach your camera to a monopod. The first is to screw the monopod's screw thread directly into the camera body. This is fine if you're using a fairly small, light lens. If you're shooting using a long, heavy telephoto lens, it's better to use a tripod mount ring. This fixes the monopod to the lens rather than the camera body, giving better balance and stopping the monopod from rotating in your hands as you try to position it. There are various different types of monopod head available, and ball heads offer the most flexibility. They allow you to shoot in portrait or landscape orientation, and angle your camera to adjust for any sloping of the monopod. Firearms A monopod can be used for firearms. They have the advantage of being light and compact, although when used in firing mode they can only be used with small firearms. They are also used as "butt spikes" as a rear support on precision rifles. Precision optical and measuring instruments When used to support a compass or transit, the monopod is referred to as a jacob staff.