Disablement of shutter release in photographic camera having interchangeable objectives
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsEiichi Tano, Tetsuji Shono
Life of this patent
Estimating the term…
Abstract
A photographic camera of interchangeable lens type has an interchangeable objective that can be removably mounted on a camera body and a plurality of switches each capable of assuming a first or a second state. The switches all assume the same state when the objective is removed from the camera body and selectively assume the first and second states according to the value of at least one lens characteristic when the objective is mounted on the camera body. An automatic exposure control mechanism is operated responsive to the selectively assumed states of the switches when the objective is mounted on the camera body. A shutter release mechanism is disabled responsive to said same state of all the switches.
Claims5
In a photographic camera of interchangeable lens type, the combination comprising:
- a camera body;
- an interchangeable objective;
- means for removably mounting the objective on the camera body;
- a plurality of switches each capable of assuming a first state or a second state, the switches all assuming the same state when the objective is removed from the camera body and the switches selectively assuming the first and second states according to the value of at least one lens characteristic when the objective is mounted on the camera body;
- control means responsive to the selectively assumed states of the switches for automatically controlling light exposure;
- shutter release means;
- and
- means responsive to said same state of all the switches for disabling the shutter release means.
Dependencies are inferred from the claim text.