Metz 54 MZ-3 operating instructions TTL fill-in flash, TTL flash exposure correction, TTL-HSS mode

Glossary

Terminologia

Terminología

•TTL fill-in flash

Some system cameras offer the possibility of TTL fill-in flash in addition to normal TTL flash control. This mode is used for daylight shots to brighten dense shadows and when shooting against the light. Based on the sen- sor measurement conducted inside the camera and the subsequent evaluation by the camera electronics the correct amount of flash light is used to produce a balanced exposure. In TTL fill-in flash mode, the came- ra automatically performs a flash exposure correction.

•TTL flash exposure correction

There are certain situations when the sensor inside the camera can be confused. This is the case with very dark subjects in front of a very bright background (resulting in an underexposed subject) or a particularly bright subject in front of a very dark background (resulting in an overexposed subject). Normal exposure correction can be completed by way of aperture and shutter speed control, changing the film speed, or a +/- correction on the camera. However, this changes all elements involved in an exposure. Consequently, a special flash exposure correction is possible on some cameras. With such flash exposure correction the over- all exposure is retained, while the dark parts are brigh- tened with fill-in flash. For further details please refer to the respective operating instructions for the given camera and the adapter.

•Anti-red eye preflash

(only with Nikon 3402 SCA adapter)

Red eyes are a purely physical effect that always ari- ses when people look directly at the camera, the ambient light is relatively dark, and the flash unit is mounted on or alongside the camera. The flash lights up the blood-filled retina at the back of the eye which passes through the pupil and is recorded by the came- ra as a red spot.

The red-eye reducing preflash function results in a sig- nificant improvement. In this function the mecablitz fires three visible, weak preflashes, before the shutter curtain opens and the measuring beam is emitted for the multi-sensor (if permitted by the flash unit and camera), and only then fires the main flash.

These three preflashes induce the pupils to close furt- her, thereby diminishing the red-eye effect. This func- tion is available in any exposure programme. For furt- her details please refer to the operating instructions for the given camera.

•TTL-HSS mode

This mode permits the use of flash at shutter speeds

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