Metz MECABLITZ 60 CT-4 - Manual (Page 47)

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maximum range of the flashgun is indicated on the setting centre. If the
distance to the subject is shorter than the indicated maximum flash range,
then select a partial light output level to match the distance.
Stepped brightening
Use the camera, or a hand-held exposure meter, to establish the required
aperture and adjust this value on the camera. To diminish the brightening
effect compared with full illumination of shadow areas, reduce the partial
light output level of the flashgun by one setting.
8.3 Fill-in flash in TTL mode
Some camera models automatically control fill-in flash when in program or
automatic modes. The manner of camera internal fill-in flash control varies
greatly between modern camera models, making it impossible to give a pre-
cise description of the individual adjusting procedures. These are normally
specified in the operating instructions for the given camera.
Shadows can also be brightened with a flashgun in TTL mode on cameras
that do not feature a special fill-in flash program or setting. In such cases the
effect of fill-in flash depends upon the characteristics of the camera’s TTL
metering system. Consequently, in many instances, it will be advisable to
adjust automatic mode for fill-in flash.
9. Illumination and Wide-Angle Diffuser
The wide-angle diffuser widens the horizontal lighting angle from 62° to 65°,
and the vertical lighting angle from 42° to 60°.
The wide-angle diffuser is intended for use with focal lengths of less than 28 .
. 35 mm (for 24 x 36 mm), and less than 50 . .75 mm (for 6 x 6 cm).
The wide-angle diffuser automatically diminishes the maximum flash ranges.
10. Exposure Corrections
The automatic exposure systems are based on a subject reflection factor of
25%, this being the average reflection factor for subjects shot with flash.
Dark backgrounds absorb a lot of light, while bright backgrounds reflect a
great deal of light (e.g. backlit scenes), thereby resulting in subject overexpo-
sure or underexposure, respectively.
10.1 Exposure correction in automatic flash mode
To compensate the above mentioned effect, the exposure can be corrected by
opening or stopping down the camera’s aperture. With a bright background
the sensor of the flashgun cuts out the flash too soon with the result that the
actual subject is too dark. With a dark background the flash is cut out too
late so that the actual subject is too bright.
Bright background:
Open the camera aperture by 1/2 to 1 f-stop
(e.g. from f/5.6 to f/4).
Dark background:
Close the aperture by 1/2 to 1 f-stop
(e.g. from f/8 to f/11).
10.2 Exposure correction in TTL flash mode
Many cameras feature an adjusting element for exposure corrections that
can also be used in TTL flash mode.
Please observe the corresponding explanations in the Operating
Instructions for the camera.
Here, exposure correction by changing the aperture on the lens is not possi-
ble. This is because the camera’s automatic exposure system will regard the
changed f–stop as a normal working aperture.
11. Care and Maintenance
Remove dust and grime with a soft dry cloth, or a silicon-treated cloth. Do
not use detergents as these may damage the plastic parts.
Forming the flash capacitor
The flash capacitor incorporated in the flashgun undergoes a physical chan-
ge when the flashgun is not switched on for prolonged periods. For this rea-
son it is necessary to switch on the flashgun for approx. 10 minutes every 3
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