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An autofocus (AF) optical system uses a sensor, a control system and a motor to focus on an automatically or manually selected point or area. An electronic rangefinder has a display instead of the motor; the adjustment of the optical system has to be done manually until indication. Autofocus methods are distinguished as active, passive or ...
Autofocus (AF) can either activate until a lock is found (single, AF-S) or be continuously active (continuous, AF-C, servo). Single-mode is especially favored for stationary subjects, when focus, once found, should stay fixed, while the continuous mode is used for moving subjects.
Scene modes vary from camera to camera, and these modes are inherently less customizable. They often include landscape, portrait, action, macro, night, and silhouette, among others. However, these different settings and shooting styles that "scene" mode provides can be achieved by calibrating certain settings on the camera.
When set to autofocus mode (AF), the lens will autofocus when directed to by the camera. When set to manual focus (MF), the lens is focused using the Focusing ring. Some lenses support full-time manual focusing (FT-M), which allows the photographer to focus the lens manually even with the mode switch set to AF, without damaging the lens (as ...
The sequence of lens designations may differ in literature. See also full list of Nikon designations, Sigma designations, Tamron designations and Tokina designations.. Nikon AF-S/Sigma HSM/Tamron USD or PZD: The lens contains an integrated ultrasonic focus motor based on piezoelectricity, which enables quiet or low noise autofocus operation.
The Mark II also has substantially faster auto focus—according to the manufacturer, six times faster upon first focus acquisition than the original E-M1. The camera also has a 60 fps max shooting rate in Pro Capture mode using the electronic shutter, [3] and vibration reduction technology in lenses as well as in camera.
The autofocus sensor(s) and electronics are actually in the camera body, and this circuitry provides electrical power and signals to a motor inside the lens that adjusts the focus. (Some older autofocus systems are based on a motor in the camera body and using a mechanical connection to the focus mechanism in the lens.)
The Canon EOS R introduces a new exposure mode called "Flexible Priority Exposure Mode" or "Fv Mode". [25] Fv mode allows the values for aperture, shutter speed, ISO sensitivity, and exposure compensation to each be set to "AUTO" or to a specific value, and it remembers the chosen values until they are deliberately reset by pressing the right ...