With closed-loop AF, on-board magnetic sensors measure gravity and vibration effects and determine the lens position so that the compensating motion can be set accurately. 2 Closed-loop AF resists the effects of gravity and vibration to preserve sharp focus in stills, videos, and panoramas.
To reduce image motion, and the resulting blur, the lens moves according to the angle of the gyroscope.Īdditionally, some iPhone models have closed-loop autofocus (AF). With OIS, a gyroscope senses that the camera moved.
1 OIS lets you take sharp photos even if you accidentally move the camera. To prevent this, some iPhone models have optical image stabilization (OIS). If you accidentally move a camera when you take a picture, the resulting image can be blurry. These systems work to automatically counteract movement, vibrations, and the effects of gravity to let you focus on taking a great shot. The advanced camera systems in some iPhone models include technology like optical image stabilization and closed-loop autofocus to help you capture great photos even in difficult conditions. Be careful not to catch your fingers in the rotating wheel.The iPhone camera helps you take great photos in any situation-from everyday moments to studio-quality portraits. Pause to regain equilibrium before stepping off the stool. You can easily get dizzy on the rotating stool it can make you fall when getting off the stool. It continues trying to move leftward because of Newton's first law of motion, but the gyro's spinning rotates it.īe careful when making the wheel stop spinning. So the top point on the gyroscope is acted on by the force applied to the axle and begins to move toward the left. If the gyroscope is spinning, think about what happens to these two sections of the gyroscope: Newton's first law of motion states that a body in motion continues to move at a constant speed along a straight line unless acted upon by an unbalanced force. If the gyroscope is not spinning, then the wheel flops over. When force is applied to the axle of a bicycle wheel, the section at the top of the gyroscope will try to move to the left, and the section at the bottom of the gyroscope will try to move to the right. Since the wheel is rigid, this can happen only if the wheel moves horizontally in the direction in which the bottom of the wheel is spinning. Precession is the downward pull of gravity that tries to make the wheel rotate faster at the bottom than at the top. Gravity produces a torque perpendicular to both the axis of the gyroscope and the vertical, and causes the horizontal precession. This is how angular momentum affects an object's motion. If you are sitting on a rotating stool, the wheel will make you turn.
When you twist the bicycle wheel, the bicycle wheel will twist you the opposite way. The bicycle wheel will exert an equal and opposite torque on you. To change the direction, you must exert a twisting force, called a torque, on the wheel. If you want to change the angular momentum of a bicycle wheel, you can change the direction. Friction produces a torque that decreases the magnitude of the vector and eventually causes the gyroscope to stop spinning. The direction and magnitude of this vector will remain constant. The angular momentum is a vector quantity which represents the product of a body's rotation of velocity and rotation of inertia in a particular axis. The gyroscope provides an example of the conservation of angular momentum. The wheel has an angular momentum that is large because its mass is centered at the rim of the wheel, causing the wheel to stand up on its own. A rotating bicycle wheel has angular momentum, which is a property involving the speed of rotation, the mass of the wheel, and how the mass is distributed.