| 摘要 |
An improved photographing mode switching mechanism is disclosed which is adapted for a camera provided with a switchover member movable between a first position in which non-diaphragm control mode is selected and a second position in which diaphragm control mode is selected. The improved photographing mode switching mechanism comprises a detection member for detecting the position of preset diaphragm ring of the lens tube and a control means for controlling the switchover member and the detection member. When the detection member detects that the diaphragm ring is in a position for the minimum aperture, the control means allows the switchover member to stay in the second position. When the switchover member is in the second position and also the detection member detects a movement of the diaphragm ring from the position for the minimum aperture to another position, the control means is connected with the switchover member and the detection member so as to move the switchover member from the second position to the first position. |
