Metz MECABLITZ 58 AF-2 digital Pentax - Manual (Page 134)

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14 Correct exposure indication
The correct exposure indication „OK“ ተ only lights up
if the shot was correctly exposed in TTL flash mode or
automatic flash mode.
If no „OK“ exposure indication ተ appears after the shot, then the shot was
underexposed. You will need to repeat the shot with the next smaller f-number
(for example, f/8 instead of f/11), or the distance to the subject or reflecting
surface (for example with bounce flash) will have to be reduced. Note the maxi-
mum flash range indicated on the display of the flash unit (see 15).
15 Flash range indication
The maximum flash range is indicated on
the display panel of the flash unit. The
value indicated relates to subjects with a
reflection factor of 25%, which applies to
most photographic situations. Strong deviations from this reflection factor, as in
the case of highly reflective or poorly reflective subjects, may affect the flash
range.
In TTL- and automatic flash mode, the subject should be in the middle third of
the indicated range. This will give the automatic exposure control sufficient sco-
pe for compensation.
To avoid overexposure, the minimum distance from the subject should be no less
than 10% of the indicated value. An adjustment can be made to a particular
photographic situation by changing the aperture setting, for example.
In manual flash mode M, the distance that must be maintained from the subject for
correct flash exposure is indicated. An adjustment to the photographic situation at
hand can be achieved by, for example, changing the aperture setting on the lens
and by selecting either full light output or „P“ for a partial light output level.
The flash range can be expressed in either meters (m) or feet (ft) according
to the chosen setting (see 7.7). There is no flash range indication in remote
mode or when the main reflector is swivelled or tilted.
Automatic adjustment of the flash range indication
The cameras transfer the flash parameters (e.g. lighting sensitivity ISO, lens
focal length, aperture and exposure correction) to the flash unit. The flash unit
automatically adjusts its settings accordingly. The maximum flash range is calcu-
lated from the flash parameters and the guide number and indicated on the
display.
This requires an exchange of data between camera and flash unit, effected for
example by tapping the shutter release.
16 Flash synchronisation
16.1 Normal synchronisation
In normal synchronisation the flash unit is triggered at the beginning of the shut-
ter time (first curtain synchronisation). Normal synchronisation is the standard
mode on all cameras. It is suitable for most flash shots.
The camera, depending on the mode being used, is
switched to the flash sync speed. Speeds between
1/30 sec. and 1/125 sec. are customary (see the
camera’s operating instructions). No settings are
necessary on the flash unit, nor is there any display
for this mode.
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P F 4.5
AZoom 70
14 m ISO 200
TTL
14 m
709 47 0237.A1 58AF-2 Pen/Sam 27.07.2010 15:17 Uhr Seite 134