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[4] Use the following graph to select the setting.
@-Case B
+1EV (2 steps)
@-Case A
Aperture
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VA
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Vertical axis: Aperture value
;
/
in 0.5EV/step
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Horizontal axis: Shutter speed
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@-Case B
in 0.SEV/step
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Diagonal axis: Gain level
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in 0.5EV/step
iY
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Y
Reference values
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VA
Aperture value: F11
@-Case ae 90
100
60 8 sag"?
Shutter speed: 1/60
Gain level: 0 dB
®-Case
-3EV (6 steps)
-4EV (8 steps)
Example: Change the aperture value to F4 without changing the exposure
@ Press IRIS and use the CONTROL dial to set the aperture value to F4.
When the aperture is changed from F11 to F4 (reducing the F value 6 steps), the exposure
becomes +3 EV brighter.
To maintain total exposure at 0 EV by the combination of aperture, shutter speed, and gain, the EV
from the shutter speed and gain control should be changed to get -3 EV.
@ Case A: To change only the shutter speed
Notes
To reduce the exposure by -3 EV using the shutter speed, you should increase the speed 6 steps.
The following calculation shows that you need to change the speed from 1/60 to 1/500.
EV variation from
Aperture control
| + | shutter speed control
1/60 to 1/500
Press SHUTTER SPEED twice and turn the CONTROL dial to set the shutter speed to 1/500.
OEV=
EV variation from
Case B: To set the shutter speed to 1/1000 and change the gain level
When the shutter speed is changed from 1/60 to 1/1000, the EV from the shutter speed contro!
changes to —4 EV. To maintain total exposure at 0 EV, +1EV (2 steps) should be added by increasing
the gain level. The following calculation shows that you need to change the shutter speed from 1/60 to
1/1000 and the gain from 0 dB to +6 dB.
EV from shutter
EV from
aperture control
speed control
gain control
j-4ev
+L tiev
|
1/60 to 1/1000
0 dB to +6 dB
Press SHUTTER SPEED three times to set the shutter speed to 1/1000, and press GAIN and
turn the CONTROL dial to set the gain level to +6 dB.
EV from
OEV=
e When recording outdoors, the brightness of a subject may be affected by weather.
e When recording conditions change, we recommend that you reset each item.
If you change the setting of the ND FILTER switch, the exposure changes.
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