| 摘要 |
An interchangeable lens assembly for a camera having a first and a second assembly unit releasably coupled to each other. The first assembly unit being directly coupleable to the camera and including an adapter member and a lens barrel which are relatively rotatable. The adapter member includes a retainer device for maintaining the adapter member rotatively fixed when the first assembly unit is mounted on the camera and a first coupling member adapted to engage a first complementary coupling member in the camera to enable releasable coupling and decoupling of the first unit with the camera. A mechanism is provided for returning the aperture signal transmission member to a predetermined position relative to the adapter member when the first assembly unit is dismounted from the camera. The lens assembly also includes a first interlocking mechanism for locking the adapter member and the lens barrel in a predetermined rotative position relative to each other when the first assembly unit is dismounted from the camera, a second locking mechanism for maintaining the adapter member and the lens barrel rotatively fixed relative to each other at a second angular position when the first assembly unit is mounted on the camera and a third locking mechanism for releasably locking the first and second lens units together when they are operatively coupled.
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