Flash Operating Modes; Ttl Flash Mode - Leica SF 26 Instructions Manual

FLASH MODES
The Leica SF 26 provides 3 modes of opera-
tion:
TTL flash mode with measurement
TTL
pre-flash
SLAVE Manual mode for use as a secon-
dary flash
LED LED permanent light for making
videos
TTL flash mode
You can take very good flash shots in a
straightforward manner in TTL flash mode. In
this flash mode, the exposure is measured by
a sensor in the camera. It measures the light
reflected by the subject through the lens
(TTL = "Through The Lens").
When the necessary amount of light is
reached, the light emission is stopped imme-
diately. The advantage of this flash mode is
that all factors influencing exposure are taken
into account automatically (e.g. filters, change
of aperture and focal length changes with
zoom lenses, extensions for close-ups, etc.).
TTL flash mode with pre-flash is a further
development of the standard TTL flash mode.
During the shot and before the actual expo-
sure, one or more almost indiscernible pre-
flashes are executed by the flash unit. The
reflected light of the measurement pre-flash is
evaluated by the camera.
According to the evaluation, the subsequent
flash exposure will be adjusted by the camera
to suit the situation (see the camera's
manual).
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