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.

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Metz 54 MZ-3 operating instructions Glossary Terminologia Terminología