Metz mecablitz M400 Manual De Instrucciones página 171

16 Troubleshooting
No maximum flash range indication appears on the display panel.
The AF measuring beam of the flash unit is not activated.
The reflector position is not automatically adjusted to the current
zoom position of the lens.
The TTL flash mode cannot be set.
Automatic switching to the flash sync speed fails to occur.
The shots are too dark.
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