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 automatic focus control in response to focus detection by means of receiving light through an objective lens, an improvement comprising: means for receiving light through the objective lens to produce electric signals; means for processing the electric signals to genera

In a camera system capable of automatic focus control in response to focus detection by means of receiving light through an objective lens, an improvement comprising: means for receiving light through the objective lens to produce electric signals; means for processing the electric signals to generate a defocusing information indicative of defocusing degree and defocusing direction relative to an ideal focal plane; means for generating a driving power for automatic focus control; means for controlling the generating means in response to the processing means; means for causing the receiving means and the processing means to periodically repeat the production of the electric signals and the generation of the defocusing information during the generation of the driving power to keep the controlling means informed of the newest defocusing information in the course of generation of the driving power; means for detecting a condition for stopping the generation of the driving power to stop the generation of the driving power on the condition; means for confirming the establishment of the condition in response to the processing means with generation of the driving power completely stopped to determine the necessity of reopening the generation of the driving power in case that the condition is not really established, wherein the detecting means includes first means responsive to the processing means for reporting an in-focus condition during the generation of the driving power, and the confirming means includes second means responsive to the processing means for reporting an in-focus condition with the generation of the driving power completely stopped; and further comprising means for finally finishing the generation of the driving power in response to the second reporting means to fix the focus adjustment for a shot when the in-focus condition is reported.