User manual METZ MECABLITZ 70 MZ-4

[. . . ] En jouant sur l'ouverture du diaphragme ou sur le niveau de puissance, la distance affichée pourra être ramenée à la valeur de la distance réelle de prise de vue. Lorsque le mecablitz est utilisé avec un adaptateur SCA 3xx2 sur un appareil photo qui transmet automatiquement la distance focale de l'objectif au mecablitz, la position de la tête zoom motorisée du mecablitz est asservie automatiquement à la distance focale de l'objectif. Synchronisation sur le premier ou le second rideau On dispose de deux possibilités pour la synchronisation du flash : - sur l'instant d'ouverture du premier rideau, ou - sur l'instant précédant de peu le démarrage du second rideau. 111 Table 1: Guide numbers at maximum light output (P 1/1) . [. . . ] Ensure that backlight does not shine directly on to the sensor as this will confuse the electronics of the flash unit. Use the camera's or a hand-held exposure meter, to establish the required aperture and shutter speed for a normal exposure. Ensure that the shutter speed either equals, or is slower than the fastest flash synch speed (varies with different camera models). The two established values for aperture and shutter speed can be set on the camera because the camera's shutter speed is slower than the camera's flash sync speed. To obtain a balanced fill-in light, for instance in order to retain the character of the shadows, it is advisable to select on the flashgun an auto aperture that is one increment lower than the aperture set on the camera. If the mecablitz is fitted with an SCA 3xx2 adapter and the camera automatically transmits the f-stop values to the mecablitz, then manual aperture setting is no longer possible!In this case manual flash-exposure correction can be used in the automatic flash mode (see Chapter 14. Manual flash-exposure correction in automatic mode can also be used if the camera does not transmit any data to the mecablitz. Additional correction of the aperture value is then no longer necessary!Tip: If possible, take a meter reading of the subject's background separately from the actual subject. (not possible with 70 MZ-4) Stroboscopic flash mode makes several images of a moving object appear in the same picture. This is particularly interesting for motion studies and for special effects (Fig. In stroboscopic mode, a predetermined number of flashes are fired at a certain flash frequency. Consequently, only a partial light output is available, with a maximum of 1/4 power. for stroboscopic exposures you can select a flash frequency (flashes per second) of 1. 50 Hz in 1 Hz increments, and a number of flashes between 2. When using the mecablitz with an SCA 3xx2 adapter and a camera that automatically transmits the speed rating to the flash unit, the mecablitz will automatically adjust the film speed (see operating instructions for camera and the SCA adapter). When using the mecablitz with an SCA 300 adapter, the SCA 301 standard foot or a camera that does not transmit film speed data, the speed of the loaded film must be set in TTL, A or M mode before selecting stroboscopic mode. The mecablitz will then take over this setting for the stroboscopic mode. The maximum possible partial light output level in stroboscopic mode is automatically adjusted. To achieve short flash durations, the partial light output level can be adjusted manually to a minimal value of 1/256. The LC display indicates the shooting distance for correct exposure at the set parameters. [. . . ] These three preflashes induce the pupils to close further, thereby diminishing the red-eye effect. This function is available in any exposure programme. For further details please refer to the operating instructions for the given camera. 3D-TTL flash control (only possible with Nikon) In this mode hardly visible measuring beams are emitted as the shutter release is depressed, before the shutter curtain opens. [. . . ]