Shutter priority

In shutter priority the photographer selects the shutter speed, the camera determines the aperture; thus ensuring a shutter speed you desire. In shutter priority mode, it is not always possible for the camera to find a perfect exposure solution. This is because the camera has 162 stops of adjustments from 30minutes to 1/8000sec; whereas most lenses only have about 6 stops of adjustments. In this mode you may find yourself with a shutter speed that has no exposure solution given the lighting, ISO, and the F-stop range of the lens.

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