| 摘要 |
<p>PURPOSE:To extend the utility value of an interchangeable lens for a diaphragm priority type automatic exposure camera by providing an intermediate lens barrel having a transfer mechanism for converting a moving stroke at equal intervals of a camera side, to a moving stroke corresponding to the variation characteristic of a diaphragm aperture at the lens side. CONSTITUTION:When a shutter button is released, a detention of an automatic diaphragm lever detained to one end of an intermediate lens barrel lever 8 is released, and the intermediate lens barrel lever 8 is pushed upward by an energizing force of a spring 13. In this case, strokes L1-L3 of one end of an interchangeable lens side corresponding to equal interval moving strokes B1-B3 of one end of a camera body side of the lever 8 become large in the open side, and become narrow toward the minimum diaphragm by a link mechanism consisting of the lever 8, link members 9, 10 and a turning lever 11. Accordingly, when such an intermediate lens barrel is interposed, an interchangeable lens for a diaphragm priority automatic exposure camera can be used for a shutter speed priority mode and a program mode, too, of both priority type and multi-mode type cameras, and its utility value is extended.</p> |
