Metz Mecablitz 50 MZ-5, Руководство по эксплуатации

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3. TTL flash mode
Fig. 4: Measuring method for TTL mode
Perfect flash exposures can be shot in a simple manner in the TTL mode.
The exposure readings in TTL mode are made by the sensor built into the camera (fig. 4). This
sensor measures the light reaching the film through the camera lens. As soon as the film has
been exposed by the correct amount of light an electronic control circuit within the camera
transmits a stop signal to the control unit, and the flash is instantly cut out.
The advantage of this flash mode is that all factors influencing the exposure of the film (filters,
change of aperture and focal length with zoom lenses, extensions for close-ups, etc.) are
automatically taken into account.
The mecablitz 50 MZ-5 offers two TTL flash modes: the TTL Mode and the TTL Easy Mode.
The TTL flash mode is only possible with cameras that feature this function. The
control unit must be fitted with a corresponding SCA adapter (see „SCA 3000
System“ instructions and SCA survey table) for this purpose.
A film must be loaded in the camera to test the TTL functions.
Exposure corrections may be necessary with pronounced differences in contrast,
for instance dark objects in snow (see ch. 14, p. 41).
3.1 TTL Easy flash mode (EM = Easy Mode)
This is the simplest way to operate the mecablitz in TTL flash mode. All buttons on the control
unit are locked, with the exception of the LCD light
(27) and the manual firing button
(35) .
In TTL Easy-Mode with the SCA 300 adapter, the zoom position is constantly adjusted to 28 mm to
ensure that the subject is always adequately illuminated.
In TTL Easy-Mode with the SCA 3000 adapter, the zoom setting is matched to the focal length of the
lens, and the distance range is indicated, provided that the camera supplies the zoom information.
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