Innovative technology explained simply

Technical glossary

Innovative technology explained simply.

Acoustic status notification (BEEP) Additional acoustic status notifications can be activated for flash readiness, flash exposure control and alerts.

AF flash metering

An autofocus auxiliary light (AF measurement flash) integrated in the flash unit automatically supports the central autofocus sensor of the camera in low ambient light conditions. A multizone AF measurement flash, also supports decentralised AF sensors.

Automatic unit shut-off

During extended breaks from photographing, the flash unit switches automatically to an energy saving standby mode to prevent the power source from discharging (Auto-Off). The wake-up function (>>> Wake-Up function) reactivates the flash unit e.g. by lightly depressing the camera shutter.

Automatic flash mode

A photo sensor integrated in the flash unit measures the flash exposure of the subject during photographing, and automatically terminates the light output as soon as the subject is correctly exposed.

Correct exposure display

The correct exposure display o.k., appears on the flash unit after photographing if the subject in automatic or TTL flash mode is correctly lit.

Dot matrix display with soft keys Individual adaptation of the display on the camera system and the operating status for optimum and self-explanatory operation of the flash unit via soft keys.

D-TTL

Further development of the TTL flash control with metering pre-flash technology for Nikon cameras.

3D and D-TTL 3D

With the 3D-TTL (Nikon) and D-TTL 3D flash control, additional data such as the distance to the subject is taken into account during flash exposure.

E-TTL

Innovative advancement of TTL flash control with pre-flash metering technology for Canon EOS and PowerShot cameras.

E-TTL II

With the E-TTL II flash control, additional data is taken into account during flash exposure, such as the distance to the subject and the guide number of the flash unit.

Extended zoom

With the motorised zoom mode the main reflector illuminates the subject more than necessary by one reflector position. Thereby providing additional scattered light indoors for a softer illumination of the subject.

Flash bracketing

Flash bracketing series with three shots of different flash exposure: minus correction value, no correction value, and plus correction value.

Flash readiness display

The flash readiness display lights up when the flash unit’s flash capacitator possesses sufficient energy for the shot.

Guide number

The guide number is the code number for the light output of a flash unit. It is dependent upon the preset ISO light sensitivity and (with zoom reflectors) on the position of the reflector, as well as on the potential use of reflector attachments (e.g. accessory wide- angle or telephoto lens). With high speed synchronisation (HSS) the guide number also depends on the shutter speed.

HSS – high speed synchronisation

In high speed synchronisation (HSS), you can flash with shutter speeds that are shorter than the flash sync time of the camera. As a result, flash photos with wide focal aperture are possible in high ambient light levels, for example in order to limit the depth of field in portrait shots.

i-TTL

Innovative advancement of the TTL flash control with metering pre-flash technology for Nikon cameras.

i-TTL-BL

With the i-TTL-BL flash control, additional data such as the distance to the subject is taken into account by the flash lighting.

Key function

Locking of operational controls. Protects against unintentional overwriting.

LCD display

Provides information about the operating modes and settings being used. (>>> Dot matrix display)

Learning mode

The flash unit is capable of recognising the camera’s pre-flash technology and in turn of circumventing pre-flash technology. The flash is therefore only activated as the main flash when taking photographs (subject to camera).

Metz – always first class.