Dual image coincidence type finder system

A dual image coincidence type finder system for a camera, said finder system having a first window and a second window through which light from an object enters, said first window and said second window being spaced from each other by a predetermined base length, said finder system comprising:

• an eyepiece optical system for observing an object image within a finder field;
• a deflecting system which deflects light entering through said second window;
• a beam combining element, which combines light entering through said first window, and light entering through said second window and deflected by said deflecting system, said object image observed within said finder field including a dual image area showing two superimposed images respectively corresponding to light entering through said first window and through said second window, said deflecting system changing a degree of relative displacement between said two superimposed images;
• a distance-related information input system which obtains information corresponding to a distance to said object, said distance-related information input system comprising a distance measuring device which independently detects said distance to said object;
• and
• a controller which controls said deflecting system, in accordance with said information corresponding to said distance to said object, to change a deflecting condition so that said two superimposed images coincide.

A dual image coincidence type finder system for a camera, said finder system having a first window and a second window through which light from an object enters, said first window and said second window being spaced from each other by a predetermined base length, said finder system comprising:

• a deflecting system which deflects light entering through said second window;
• a beam combining element, which combines light entering through said first window, and light entering through said second window and deflected by said deflecting system;
• a real image type objective optical system, light combined by said beam combining element entering said objective optical system, a real image of said object being formed by said objective optical system on an image plane;
• an eyepiece system for observing said real image formed by said objective optical system, and
• a distance-related information input system which obtains information corresponding to a distance to said object, and a controller which controls said deflecting system, in accordance with said information corresponding to a distance to said object;
• wherein said real image includes a dual image composed of two superimposed images respectively corresponding to light entering through said first window and said second window,
• wherein said deflecting system is capable of changing a degree of relative displacement between said two superimposed images;
• wherein said controller controls said deflecting system to change a deflecting condition so that said two superimposed images coincide with each other;
• and
• wherein said distance-related information input system comprises a distance measuring device which independently detects a distance to said object.