Metz MECABLITZ 44 AF-3/4 Nikon - Manual (Page 71)

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Setting the D-TTL flash mode
• Mount the mecablitz on the camera.
• Switch on the mecablitz and the camera.
• Lightly touch the camera’s shutter release to induce a data exchange be-
tween the flash unit and the camera.
• Continue depressing the “Mode” key until “D-TTL” flashes on the LC display.
• The setting becomes immediately effective. The LC display returns to its nor-
mal state after approx. 5 sec.
4.2.1 D-TTL 3D flash mode with the mecablitz 44 AF-4N
This flash mode is only possible in conjunction with “D-AF-Nikkor len-
ses”. Some cameras (e.g. D100) do not support the D-TTL 3D flash mode
for SPOT exposure metering. This flash mode will then either be automa-
tically cancelled or it cannot be activated so that the normal D-TTL flash
mode will be performed.
The D-TTL 3D flash mode optimizes a balanced exposure between subject
and background (including fill-in flash) in conjunction with digital SLR
cameras. Prior to exposure a series of almost invisible measuring preflashes
are fired by the mecablitz which are evaluated by the TTL multi-sensor and
the camera’s micro-controller. The camera then adapts TTL flash exposure
optimally to the given photographic situation. The camera-to-subject distance
(“D-TTL-3D flash mode”) is additionally taken into account when determining
the optimal flash output.
Setting the D-TTL 3D flash mode”
• Mount the mecablitz on the camera.
• Switch on the mecablitz and the camera.
• Lightly touch the camera’s shutter release to induce a data exchange be-
tween the flash unit and the camera.
• Continue depressing the “Mode” key until “D TTL ” flashes on the LC display.
• The setting becomes immediately effective. The LC display returns to its nor-
mal state after approx. 5 sec.
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4.3 Manual TTL flash exposure correction
The TTL auto flash mode of most cameras is matched to a 25 % degree of
light reflection by the subject (average amount of light reflected by subjects
shot with flash). Consequently, a dark background that absorbs a great deal
of light, or a bright background that reflects a great deal of light, can result
in under- or overexposure, respectively.
To offset this effect a correction value can be set on some cameras (see
Table 1) to manually match the TTL flash exposure (or D-TTL flash exposure
on digital SLR cameras) to the photographic situation. The actual extent of
correction depends on the contrast prevailing between subject and back-
ground!
A dark subject in front of a bright background: Positive correction
value. Light subject in front of a dark background: Negative correc-
tion value. Correction value settings can change the maximum flash
range indicated on the mecablitz LC display and match it to the given
correction value (depends upon the camera model)!
Exposure correction by changing the lens diaphragm is not possible because
the camera’s automatic exposure system will automatically regard the changed
diaphragm as the normal working aperture.
After the exposure do not forget to reset the TTL flash exposure cor-
rection back to the normal value on the camera!
Setting correction values for the mecablitz 44 AF-3N
Manual correction values for flash exposure are always set on the camera.
Please refer to Table 1 for the diverse camera types and to the setting in-
structions given in the individual camera manuals.
Setting correction values on the mecablitz 44 AF-4N when using cameras
from Group A of Table 1
• Mount the mecablitz on the camera.
• Switch on the mecablitz and the camera.
• Lightly touch the camera’s shutter release to induce a data exchange be-
tween the flash unit and the camera.
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