User manual METZ MECABLITZ 40 AF-4

[. . . ] Such batteries may leak, releasing chemicals which can damage the flashgun. â· Always switch off the flashgun before changing the batteries! â· Do not touch the diffuser after triggering several flashes at short intervals. When you trigger a flash, there may be no nontransparent material immediately in front of or on the reflector. [. . . ] the adjusted zoom reflector position is indicated in the LC display (C). If a focal length shorter than 28 mm is used, the LC display (C) indicates an "F" to signalize danger of vignetting. When the flashgun is switched on with the main switch the activated zoom reflector position is always A. As soon as the camera's shutter release is lightly touched, the focal length of Manual motor-zoom reflector control The ZOOM key permits you to change the zoom reflector's position independently of the focal length of the lens. By lightly tapping the ZOOM key you can select the zoom positions in the following sequence: M. ZOOM mode no warning is given if the focal length of the lens is shorter than the focal length of the zoom reflector. The mecablitz transmits different signals and messages to the camera when it is connected to the camera and is switched on. flash-ready indication When the flash capacitor is charged , the "READY" lamp on the mecablitz lights up to signal flash readiness. the flash readiness signal is transmitted to the camera where it is indicated by a corresponding display in the camera's viewfinder. On some cameras (depending on the operating mode and camera model) the shutter is automatically changed to flash sync speed when flash readiness is reached. The flash will not be fired if the shutter is released before the flash ready light illuminates with the result that the exposure may be incorrect if the camera control circuit has already changed over to flash sync speed. Automatic flash sync speed control When the flash unit is on, the camera will automatically switch it to flash sync speed from any operating mode selected. The sync speed depends on the camera model and usually ranges between 1/30 sec. Some camera models will, when the flash unit is on, switch it to flash sync speed as soon as program mode , , P" or full-auto mode is selected. Exposure verification When a flash shot has been taken, the TTL symbol (A) briefly flashes in the LC display of the mecablitz to confirm correct exposure. If the TTL symbol does not flash the available light was insufficient. In such an event you must either diminish the distance to the subject or set a smaller f-number. Information displayed in the camera's viewer The following table only gives a general survey. The mecablitz receives its information exclusively from the connected TTL-controlled camera. exposure measurement in TTL mode (TTL = through-the-lens) is completed by the camera's sensor. This sensor measures the light reaching the film through the camera lens. An electronic control circuit within the camera transmits a stop signal to the flashgun as soon as the film has been exposed by the correct amount of light; the flash is then instantly cut out. [. . . ] Flash exposure sequences Some cameras permit a sequence of shots to be taken of the same subject with different exposure parameters. When this function is activated, three pictures - as an example - can be taken in succession: The first shot is made with a negative flash exposure correction (less light output), the second is normally exposed, and the third is taken with a positive flash exposure correction (more light output). For further details on this function and the settings to be made please refer to the camera's operating instructions. Forming the flash capacitor The flash capacitor incorporated in the flashgun undergoes a physical change when the flashgun is not switched on for prolonged periods. [. . . ]