Metz MECABLITZ 50 AF-1 digital Pentax User Manual
Page 96
96
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8 Manual flash exposure correction
The auto flash exposure mode of most cameras is adjusted to a reflection factor
of 25% (the average reflection factor of flash subjects). A dark background that
absorbs much of the light or a highly reflective bright background (backlit shots,
for example) may result in, respectively, underexposure or overexposure of the
subject.
To offset these effects, the flash exposure can be adjusted manually for the shot
with a correction value. The extent of the correction depends on the contrast bet-
ween the subject and background!
In P-TTL flash modes (P-TTL, P-TTL-HSS) , manual flash exposure correction
factors of from -3 EV (f-stops) to +3 EV (f-stops) can be adjusted on the flash
unit in one-third increments.
Tip:
Dark subject against light background: positive correction factor. Light subject
against dark background: negative correction factor.
Exposure correction by means of alteration of the lens aperture setting is
impossible, since the camera’s automatic exposure program regards the
altered aperture setting as the normal working aperture setting.
When setting the correction factor, the distance shown in the display can
change and be adjusted to the correction factor (depending on the
camera model)!
Setting procedure
• Press button — or + until „EV“ flashes.
Set a negative correction factor with the
button — or a positive one with the
button +.
The setting takes effect immediately.
☞
After about 5 seconds the display stops flashing and the setting is saved auto-
matically. After saving, „EV“ appears in the display with the correction value.
Press the button — or + until „EV“ without a
correction factor is shown. The setting takes
effect immediately.
After about 5 seconds the display stops flashing and
the setting is saved automatically.
Manual flash exposure correction is only possible in TTL flash mode if the
camera supports this function (consult the camera’s operating instruc-
tions)! If the camera does not support this function, the adjusted correc-
tion will have no effect. If the camera does not support this function, no
corrective value can be set on the flash unit, the corrective value remains
ineffective.
For some camera models, the manual flash exposure corrections must be adju-
sted on the camera. If this is the case, no correction value will appear on the
flash unit display.
After the shot, remember to cancel the flash exposure correction!
Attention: Strongly reflecting objects in the motif can have a negative impact
on the camera’s automatic exposure. The photograph will be
underexposed. Remove reflecting objects or set a positive
correction value.
☞
EV
0,7
10
m
Zoom
35
mm
TTL
P
☛
EV
0,7
EV
10
m
Zoom
35
mm
TTL
P
☛
EV
709 47 0191.A3 50AF-1 Pen. 17.12.2010 13:22 Uhr Seite 96