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Example:
Established aperture = f/8; established shutter speed = 1/60 sec. Flash
synch speed of the camera, e.g. 1/100 sec. (see operating instructions for
the given camera).
The two established values for aperture and shutter speed can be set on the
camera because the camera’s shutter speed is slower than the camera’s flash
synch speed.
To maintain a balanced range of highlights, for instance in order to retain the
character of the shadows, it is advisable to select the automatic aperture on
the flashgun one setting lower than the aperture adjusted on the camera. In
the above example the camera was adjusted to f/8. Consequently, we advise
you to set an aperture of f/5.6 on the flashgun.
When shooting into the light, ensure that the backlight does not shine
directly onto the sensor as this will confuse the flashgun’s electronics!
7. Auto-Check Display
The auto-check signal o.k. lights up only when the frame will be, or was, cor-
rectly exposed in auto mode.
In this manner it is possible to manually fire a test flash while in auto mode so
that the correct aperture can be established beforehand. This is particularly
valuable with bounced (indirect) flash when reflection conditions are difficult
to judge.
The test flash is triggered with the manual firing button ቧ (fig. 2).
If the auto-check display o.k. remains dark after a test flash, then adjust the
next wider aperture, or diminish the distance to the reflection surface of the
subject, and then repeat the test flash.
The f-stop established in this manner must also be set on the camera.
Hold the camera and the flashgun with photosensor in the same man-
ner as for the actual shot.
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8. Illumination and Wide-Angle Diffuser
The wide-angle diffusor widens the horizontal lighting angle from 62° to
65°, and the vertical lighting angle from 42° to 60°.
The wide-angle diffusor is intended for use with focal lengths of less than 28
mm
(for 24 x 36 mm), and less than 70 mm (for 6 x 6 cm).
Mounting:
Slip the wide angel diffusor on the reflector and allow the two lateral catches
to engage into the reflector slots.
For removal, slightly lift the diffusor laterally and pull it off toward the front.
When the wide angle diffusor is used, there is a loss in light of one stop
value. The guide number and maximum range for computer operating are
then reduced to about 70% of the value for use of flash without wide angle
diffusor. With the wide angle diffusor used in the auto mode, the mark „W“
on the aperture calculator dial indicates the maximum operating range. For
aperture settings, there is the mark „N“.
Shadows on the lower pictures edge are noticeable for exposure with short
distance due to parallaxe between the camera lens and flash unit reflector.
This can be rectified by use of the wide angle diffusor or bracket adapter 45-
35 or 60-28.
9. 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.
9.1 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
