| 摘要 |
<p>An electronic flash unit having mutually independent devices which influence its luminous intensity is proposed, which displays on an aperture computer on three scale carriers the allocation of the stop values to the range values as a function of film sensitivity. The unit is provided with a mechanical coupling to one of the scale carriers (9) of at least one of the devices (7) which influence the luminous intensity. As a result, it is possible to display the allocation of the stop values to the range values while taking account of the changes effected by the devices. Each scale carrier (9, 16, 47) can be displaced with respect to its own read off mark (window) (13, 27, 49). The individual values can therefore be read off easily and unmistakably and can, moreover, be input into a control circuit for limiting the flash duration. This purpose is served by a selector switch (52) for setting the desired stop value which influences a corresponding setting of the lens stop of a camera via various resistors (62) and an output (63), and influences a device for limiting the flash duration via RC elements (64). <IMAGE></p> |
