4. Flashgun instructions to the camera
The mecablitz transmits different signals and messages to the camera when it is connected to the camera and is switched on.
4.1 Flash-ready indication
The green light 
on the mecablitz illuminates when the flash capacitor is fully primed, thereby indicating flash readiness. This means that flash can be used for the next exposure. The flash rea- diness signal is transmitted to the camera where it is indicated by a corresponding display in the camera’s viewfinder. Depending on the selected operating mode, the camera is 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. Please refer to the camera’s operating instructions for further details.
4.2 Automatic flash sync speed control
Flash readiness has the following effect on system cameras:
Camera mode: | Effect: |
Programmed auto exposure mode [P]:
Camera changes to 1/30 - 1/250 sec. flash sync speed, depending on camera model.
Aperture priority mode[Av]: | As in [P] |
Shutter priority mode [Tv]:
Shutter speeds can be set on the camera that equal or are slower than the sync speed.
Manual mode [M]: As in [Tv]
Note: If (independent of the operating mode) a shutter speed faster than the flash sync speed is set on the camera, the camera will automatically change to flash sync speed when flash readiness is reached.
Refer to the camera's operating instructions for details.
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