Camera system
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsMasahiro Kawasaki, Hiroyuki Takahashi, Shigeru Iwamoto
Life of this patent
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Abstract
A camera system for communicating data including a K value of an automatic focusing drive pulse coefficient between a micro computer on a camera body and a zoom lens mounted to the camera body. The zoom lens includes a position detecting device which detects one of a plurality of divided focal length steps corresponding to a focal length of the zoom lens. A K value outputting device outputs a K value at a telephoto extremity or wide angle extremity of the zoom lens, and an arithmetic operating device calculates the K value at each focal length step in accordance with the data of the position detecting device and the K value outputting device.
Claims11
A camera system for communicating data between a micro computer in a camera body and a zoom lens mounted to the camera body, wherein at least a K value representing an automatic focusing drive pulse coefficient is transmitted from said zoom lens to said micro computer in said camera body, said zoom lens comprising:
- a position detecting means for detecting one of a plurality of divided focal length steps that correspond to a focal length of said zoom lens;
- a K value outputting means for outputting a K value at a telephoto extremity or a wide angle extremity of said zoom lens;
- and,
- an arithmetic operating means for calculating said K value at each focal length step in accordance with data of said position detecting means and said K value outputting means.
Dependencies are inferred from the claim text.