초록 ▼

In an interchangeable lens assembly video camera system including an interchangeable lens assembly and a camera, a filter of an AF signal processing circuit (113) of the camera extracts a focus evaluation value signal from an image sensing signal corresponding to one or a plurality of focus detectio

In an interchangeable lens assembly video camera system including an interchangeable lens assembly and a camera, a filter of an AF signal processing circuit (113) of the camera extracts a focus evaluation value signal from an image sensing signal corresponding to one or a plurality of focus detection areas in an image sensing surface, and on the basis of the transmitted focus evaluation value signal from the camera and data stored in a ROM (120), the microcomputer (116) performs a zooming operation of a zoom lens (102) while maintaining an in-focus state of a focus lens (105).

대표청구항 ▼

1. An interchangeable lens assembly video camera system comprising a camera and an inner focus interchangeable lens assembly, wherein said camera comprisesextracting means for extracting a focus evaluating signal from an image sensing signal corresponding to a focus detection area in an image sensin

1. An interchangeable lens assembly video camera system comprising a camera and an inner focus interchangeable lens assembly, wherein said camera comprisesextracting means for extracting a focus evaluating signal from an image sensing signal corresponding to a focus detection area in an image sensing frame of said camera, and transmitting means for transmitting the focus evaluating signal to said lens assembly; said lens assembly comprises receiving means for receiving the focus evaluating signal from said camera; information storing means for storing, in advance, control information for compensating a change of a focal point caused by a zooming operation; control means for detecting a focus state on the basis of the received focus evaluating signal and the control information stored in said information storing means, and computing a driving direction and a driving velocity of a focus lens of said lens assembly, on the basis of the detected focus state, in order to drive said focus lens to an in-focus point, and driving means for driving said focus lens in accordance with the driving direction and the driving velocity.