Metz MECABLITZ 28 C-2 Mode D'emploi page 35

The two established values for aperture and shutter
speed can be adjusted on the camera because the
camera's shutter speed is slower than the camera's
flash synch speed.
To maintain a balanced range of highlights, for
instance in order to retain the character of the
shadows, it is advisable to select the automatic
aperture on the flashgun one setting lower than the
aperture adjusted on the camera. In the above
example the camera was adjusted to f/8. Consequent-
ly, we advise you to adjust f/5.6 as the aperture setting
on the flashgun.
Tip:
Proceed in the following manner if an automatic
aperture setting of f/5.6 cannot be used on the
flashgun due to the adjusted film speed:
Select the auto aperture f/8 on the mecablitz, and set
a shutter speed of 1/30th sec. on the camera at f/11
camera aperture.
7. Fill-in flash in daylight
If, in this example, the auto aperture f/4 were to be
adjusted on the mecablitz, then this would result in a
shutter speed of 1/125 sec. at the camera aperture
f/5.6. This would then fall short of the camera's
synchronisation speed of 1/100th sec.
When shooting into the light, ensure that the
backlight does not shine directly onto the
sensor as this will confuse the flashgun's
electronics.
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