Apparatus and method for finding optimal zooming speed

摘要

An optimal zooming speed determining device includes: a storage to store a zooming speed at each position of a zoom lens; a tracking implementer to calculate a position of the zoom lens changed in a unit time at a zooming speed at each position of the zoom lens; a moving time calculator to calculate a difference between a position of a focus lens corresponding to a position of the zoom lens before the position of the zoom lens is changed and a position of the focus lens corresponding to the changed position of the zoom lens, and calculate a focus moving time by dividing the difference between positions of the focus lens by a highest moving speed of the focus lens; and a zooming speed determiner to reduce the zooming speed at each position of the zoom lens, if the focus moving time is greater than the unit time.

主权项

1. An optimal zooming speed determining device comprising:
a storage configured to store a zooming speed at each position of a zoom lens; a tracking implementer configured to calculate a position of the zoom lens changed in a unit time at a zooming speed at the each position of the zoom lens; a moving time calculator configured to calculate a difference between a position of a focus lens corresponding to a position of the zoom lens before the position of the zoom lens is changed and a position of the focus lens corresponding to the changed position of the zoom lens, and calculate a focus moving time by dividing the difference between positions of the focus lens by a highest moving speed of the focus lens from among a plurality of preset moving speeds of the focus lens; and a zooming speed determiner configured to reduce the zooming speed at the each position of the zoom lens stored in the storage, if the focus moving time is greater than the unit time.