| 摘要 |
<p>A lens system includes: a lens unit; a drive unit driving the lens unit in an optical axis direction; a detector detecting a position of the lens unit; a lens operation unit that operates driving of the lens unit; and a computing unit that computes a positional command value for controlling driving of the lens unit based on a signal input from the lens operation unit and controls driving of the lens unit; a time setting unit; and a threshold setting unit setting a positional difference threshold for switching the first and second current values set in the drive unit. When the difference between the positional command value and the lens position is larger than the positional difference threshold and duration after the second current value is set has not exceeded the high-current maximum time, the second current value is set. In other cases, the first current value is set.</p> |
