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Focal-plane shutters may also produce image distortion of very fast-moving objects or when panned rapidly, as described in the Rolling shutter article. A large relative difference between a slow wipe speed and a narrow curtain slit results in distortion because one side of the frame is exposed at a noticeably later instant than the other and the object's interim movement is imaged.
Focal-plane shutters are usually implemented as a pair of light-tight cloth, metal, or plastic curtains. For shutter speeds slower than a certain point (known as the X-sync speed of the shutter), which depends on the camera, one curtain of the shutter opens, and the other closes after the correct exposure time.
The first one opens and the second curtain follows it after a delay equal to the nominal shutter speed. A typical modern focal-plane shutter on a full-frame or smaller sensor camera takes about 1 ⁄ 400 s to 1 ⁄ 300 s to cross the sensor, so at exposure times shorter than this only part of the sensor is uncovered at any one time.
Chimping is a colloquial term used in digital photography to describe the habit of checking every photo on the camera display immediately after capture. Some photographers use the term in a derogatory sense to describe the actions of amateur photographers, but the act of reviewing images on-camera is not necessarily frowned upon by professional ...
To take an image, the mirror swings upwards in the direction of the arrow, the focal-plane shutter opens, and the image is projected and captured on the image sensor. After these actions, the shutter closes, the mirror returns to the 45-degree angle, and the built-in drive mechanism re-tensions the shutter for the next exposure.
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The shutter speed dial of a Nikkormat EL Slow shutter speed combined with panning the camera can achieve a motion blur for moving objects. In photography, shutter speed or exposure time is the length of time that the film or digital sensor inside the camera is exposed to light (that is, when the camera's shutter is open) when taking a ...