公开(公告)号：US5319411A

公开(公告)日：1994-06-07

申请号：US743241

申请日：1991-08-09

申请人： Kenji Ishibashi ,  Yoshihiro Hara ,  Kazuhiko Yokawa ,  Akihiko Fujino ,  Yasuo Maeda ,  Shigeto Ohmori ,  Fumiaki Ishito ,  Hiroshi Ootsuka ,  Masayuki Miyazawa

发明人： Kenji Ishibashi ,  Yoshihiro Hara ,  Kazuhiko Yokawa ,  Akihiko Fujino ,  Yasuo Maeda ,  Shigeto Ohmori ,  Fumiaki Ishito ,  Hiroshi Ootsuka ,  Masayuki Miyazawa

IPC分类号： G02B7/10 ,  G03B13/12 ,  G03B17/20 ,  G03B19/12 ,  G03B13/00

CPC分类号： G03B13/12 ,  G02B7/102 ,  G03B17/20 ,  G03B19/12

摘要： A single-lens reflex camera comprises a taking lens having a zooming optical system, a finder whose angle of view is determined according to a focal length of the taking lens, and an operation member which is manually operated. In the single-lens reflex camera, the focal length of the taking lens is changed by driving the zooming optical system, and the zooming operation is controlled in response to an operation of the operation member so that the focal length of the taking lens is changed in the wide-angle direction by a predetermined amount. An angle of view corresponding to that which is seen before the focal length is changed is displayed within the finder.

摘要翻译： 单镜反光照相机包括具有变焦光学系统的摄影镜头，根据拍摄镜头的焦距确定其视角的取景器以及手动操作的操作构件。 在单镜头反光相机中，通过驱动变焦光学系统来改变拍摄镜头的焦距，并且响应于操作部件的操作来控制变焦操作，使得拍摄镜头的焦距被改变 在广角方向上预定量。 在取景器内显示与在焦距变化之前所看到的相对应的视角。