| 摘要 |
PURPOSE:To make it possible to prevent difference between actual focusing condition on film surface and focusing condition judged and displayed by machine caused by differences in range of depth of focus, by changing setting of the judging level of focusing condition in accordance with the range of depth of focus. CONSTITUTION:When a light which passed through lens 1 arrives to the light receiving section of focusing condition detecting circuit 4 provided at site 2 which corresponds to the focusing plane of lens 1, detecting circuit 4 outputs electric signal V. The standard range of this electric signal varies in accordance with the difference in range of the depth of focus caused by the difference in value of lense opening as shown in the diagram (La, Lb, and Lc). The output of detecting circuit 4, therefore, can be checked whether it is in a range of depth of focus of the lens opening or not, by comparator 5 and standard value setting circuit 6, and, when it is lower than the judging level, the focusing condition can be confirmed by a lighting display of display circuit 7. Thus differences between focusing condition display of judging level and actual focusing condition can be prevented. |
