Ttl- Flash Mode With Measuring Preflash - Metz Mecablitz 58 AF-2 digital Mode D'emploi

5.2 TTL- flash mode with measuring preflash

Depending on the camera model, the preflashes precede the main flash
by such a short interval that they practically cannot be distinguished
from the main flash! The preflashes do not contribute to the lighting of
the shot.
Setting procedure:
Mode
A TTL
TTL HSS
Set
TTL
AZoom 35
11 m
Mode Para Sel
Mode
TTL
TTL
5.3 Automatic fill-in flash mode
Ensure that the contre-jour light source does not shine directly into the
lens, as this will interfere with the camera's TTL metering system.
5.4 Automatic flash mode