Metz Mecablitz 54 MZ-3 - Manual (Page 92)

92
Glossary
Terminologia
Terminología
First-curtain / Prima tendina / 1ª Cortinilla
Second-curtain / Seconda tendina/ 2ª Cortinilla
17. Glossary
• Correct exposure indication in the camera’s viewfinder
When in automatic or TTL mode, many cameras indi-
cate correct exposure or underexposure of the film by
a corresponding signal in the viewfinder.
• Automatic flash synch speed control
When flash readiness is reached, most system came-
ras automatically change over to flash synch speed. On
some cameras, slower shutter speeds are retained. If
flash readiness indication disappears after the flash
has been fired, or when the flash unit is switched off,
then the camera will automatically return to the pre-
viously set shutter speed.
• Triggering control
If the aperture set on the lens and the prevailing
lighting conditions require a shutter speed that equals
or is faster than the flash synch speed, then a flash will
not be fired when the shutter is released on the came-
ra. The shot is then taken with the existing ambient
light, thereby avoiding overexposure.
• Optional 1st or 2nd curtain synchronisation
(see photos)
Two forms of flash synchronisation are available:
- The moment when the first shutter curtain opens
- The moment just before the second shutter curtain
closes
The desired synchronisation is pre-selected on the
SCA adapter. Second curtain synchronisation is parti-
cularly advantageous when using slow shutter speeds
and shooting moving objects that have their own sour-
ce of light.
• Autofocus measuring beam
The AF measuring beam is activated by the camera
electronics when the ambient lighting level is no longer
sufficient for automatic focusing. The beam projects a
striped pattern on to the subject, and the camera uses
this pattern to focus automatically. If an SCA 3xx auto-
focus adapter is used, then only the AF measuring
beam integrated in this adapter will be activated.
• Program flash
Some cameras merge ambient light and flash illumina-
tion in the Program Flash mode. The camera automati-
cally sets the appropriate shutter speed/aperture com-
bination and controls the flash in TTL mode. This
ensures exceptionally simple operation of flash unit
and camera.
700 47 0078-A4 PDF GB-I-E 30.09.2008 14:12 Uhr Seite 92