Metz SCA 3202-M manual Preflash function for red-eye reduction

☞The maximum flash range will not be indica- ted when the flash unit’s reflector is swivelled or tilted or when the flash unit is in cordless Metz Remote Mode.

Depending on the type of flash unit used, the ISO sensitivity and the aperture may be indicated. On some camera models the indicated values may deviate from the camera settings. These, however, are insignificant for the TTL flash mode and need not be corrected manuallly.

4.8 Preflash function for red-eye reduction

Red eyes are always the result of a physical effect. This arises whenever a person looks more or less straight into the camera, the ambien light is relatively dark and the flash unit is mounted on or directly next to the camera. The flash unit illu- minates the back of the eyes, revealing the blood filled retina through the pupil. This is recorded by the camera as a red spot in the eyes.

The red-eye reduction function brings about a sig- nificant improvement in this respect. When this facility is used the flash unit triggers, prior to shut- ter operation, a few weakly visible preflashes which are followed by the main flash. These pre- flashes induce the pupils to close down, thereby diminishing the red-eye effect.

The preflash function is set on the camera and in- dicated by a corresponding symbol (see camera manual).

☞On various cameras, second-curtain synchro- nisation (REAR) will not be performed when the preflash function is activated.

Some cameras will support the preflash func-

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