| 摘要 |
A device for interchangeable lenses of screw mount type for switching between EE (electronic eye) exposure operation and manual exposure operation is provided which generally comprises an EE aperture setting ring, an EE-Manual switching ring which is also used as a manual aperture setting ring, and a rocking lever which may be selectively engaged with either of said two rings. When the switching ring is set to the manual exposure operation, the rocking lever engages with the manual aperture setting cam surface of the switching ring and is limited in rotation, but when the switching ring is set to the EE exposure operation, the rocking lever is disengaged from the manual aperture setting cam surface and is engaged with the EE aperture setting cam surface of the EE aperture setting ring and is limited in rotation. An aperture blade actuating ring is rotated in response to the angle of rotation of said rocking lever to close aperture blades to a selected aperture. |
