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mecablitz and camera functions
Funzioni del mecablitz e della camera
mecablitz y funciones de la cámara
Fig. 17 / Grabado 17
m
Fig. 18 / Grabado 18
TTL
M. Zoom
mm
TTL
mm
Auto Zoom
There can be various reasons for faulty exposures
in the different exposure and automatic pro-
grams.
Refer to the operating instructions to
establish whatever is applicable to the dis-
plays in the viewfinder for the given came-
ra model.
5.4 Information in the LC display
Canon EOS cameras transmit the ISO film speed,
focal length (mm), f-stop and exposure correction
to the mecablitz so that the flash unit automatical-
ly adapts its settings accordingly. The maximum
flash range is then calculated from these values
and the flash unit's guide number. Flash mode,
maximum flash range, aperture and the zoom
reflector position are all indicated by the meca-
blitz LC display.
If the mecablitz operates without having received
data from the camera (e.g. when the camera is
switched off), then only the selected flash mode,
the reflector position and „M.Zoom" are indicated
(Fig. 17). Aperture and maximum flash range are
only displayed if the camera transmits the corre-
sponding data to the mecablitz.
Some cameras suppress the maximum flash
range indication on the mecablitz LC dis-
play in the event of high ISO values (e.g.
ISO 6400) or flash exposure corrections.
5.4.1 Maximum flash range indication in
TTL flash mode
The mecablitz LC display indicates the maximum
flash range. The indicated value relates to a factor
of 25% of light reflection by the subject, which
applies to most photographic situations. Pro-
nounced deviations from this reflection factor, e.g.
highly reflective or poorly reflecting objects, can
influence the maximum flash range of the meca-
blitz.
Always observe the maximum flash range indi-
cated by the mecablitz LC display. The subject
should be within approx. 40% and 70% of the
indicated value. This gives the electronic circuit
sufficient scope for compensation. To avoid over-
exposure, the minimum flash-to-subject distance
should not be less than 10% of the indicated
value. Adaptation to the given photographic
situation is possible by changing the aperture set-
ting on the lens.
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