초록 ▼

A camera system with an auto-focusing system includes a camera body and an interchangeable zoom lens. The interchangeable objective lens stores various data to be sent to the camera body for improving automatic focus adjustment, such as an information necessary to convert the detected defocus inform

A camera system with an auto-focusing system includes a camera body and an interchangeable zoom lens. The interchangeable objective lens stores various data to be sent to the camera body for improving automatic focus adjustment, such as an information necessary to convert the detected defocus information into a movement of the driving power source to carry out the automatic focus adjustment. The driving power source in the camera body is controlled in response to the data from the interchangeable objective lens and the detected focus information, the driving power being transmitted to the interchangeable objective lens. The camera body is further capable of inhibiting the focus adjustment or focus indication in response to a data from the interchangeable objective lens under an unfavorable condition.

대표청구항 ▼

In a camera system capable of both automatic exposure control and automatic focus control and adapted to employ an interchangeable lens unit including a first signal means for producing a first electrical signal indicative of data intrinsic to said interchangeable lens unit and used for the automati

In a camera system capable of both automatic exposure control and automatic focus control and adapted to employ an interchangeable lens unit including a first signal means for producing a first electrical signal indicative of data intrinsic to said interchangeable lens unit and used for the automatic exposure control, second signal means for producing a second electrical signal indicative of data intrinsic to said interchangeable lens and used for the automatic focus control and a focus adjustable optical system, said camera system comprising: a camera body to which said interchangeable lens unit is attachable; first light receiving means for receiving light from an object through said optical system of said interchangeable lens unit to produce a third electrical signal indicative of the brightness of the object; second light receiving means for receiving light from the object through said optical system to produce a fourth electrical signal indicative of the defocusing condition of an image of the object relative to a predetermined focal plane; automatic exposure control means for carrying out the automatic exposure control in accordance with said first and third electrical signals; automatic focus control means for carrying out the automatic focus control in accordance with said second and fourth electrical signals; determining means for determining whether or not said interchangeable lens unit has been mounted on said camera body, and control means for disabling said automtic focus control means while enabling said automatic exposure control means when the determination by said determining means indicates that said interchangeable lens unit has not been mounted on said camera body, said control means enabling both of said automatic exposure control means and said automatic focus control means when the determination by said determining means indicates that said interchangeable lens unit has been attached to said camera body, wherien said automatic exposure control means is capable of being enabled without the existance of said first electrical signal when said determining means determines that said interchangeable lens unit has not been mounted on said camera body.