| 摘要 |
In a viewfinder having objective lens elements G1 to G4 and performing zooming by driving the objective lens elements G2 and G3 in the direction of the optical axis x, a finder cam 6 is provided that interlocks with an axially movable barrel 9 through a pin 9a and drives the objective lens elements G2 and G3 through cam followers 4 and 8 and lens frames 5 and 7, respectively.
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