JVC GY-HM850CHE, Инструкция по эксплуатации

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One Push Auto Iris
F
When the camera recorder is in the Manual Iris
mode, press the [IRIS] button on the lens to adjust
the iris according to the brightness of the subject.
Memo :
0
“One Push Iris” can also be assigned to other
user buttons.
(
A
P42 [Assignment of Functions to User
Buttons] )
Push Auto Iris
When the camera recorder is in the Manual Iris
mode, press and hold the [IRIS] button on the lens
to change to the Auto Iris mode temporarily. The
iris will be automatically adjusted according to the
brightness of the subject.
Memo :
0
“One Push Iris” can also be assigned to other
user buttons.
(
A
P42 [Assignment of Functions to User
Buttons] )
About the Iris F-number
Blurry effects due to “small aperture diffraction”
may occur when the diameter of the iris becomes
too small. When this phenomenon occurs, the F-
number on the screen turns gray to warn you that
the diffraction F-number of the iris has been
exceeded.
You are recommended to make appropriate use of
ND filters to prevent the F-number from turning
gray.
Setting the Gain
This function electrically boosts the light sensitivity
when there is insufficient illumination on the object.
You can set the gain of the video amplifier
according to the brightness of the object. Select the
setting mode according to your shooting
conditions.
.
Manual Gain Mode (Manual Gain
Switching)
0
Select the gain level of the video amplifier using
the [GAIN L/M/H] selection switch on the
camera recorder.
0
The
a
icon on the screen disappears.
0
The default positions of the switch are as
follows.
[L] : 0dB
[M] : 6dB
[H] : 12dB
Memo :
0
You can change the gain value of each position
in the menu. Increasing the sensitivity causes
the screen to appear grainier.
0
The camera recorder switches to the Auto Gain
mode when the gain value is set to “ALC”.
(
A
P109 [GAIN L/GAIN M/GAIN H] )
Automatic Gain Mode (Automatic Gain
Adjustment)
1
Set the [FULL AUTO] switch to “ON”.
0
The camera recorder switches to the Auto
Gain Adjustment mode (fixed at “ALC”), and
the gain of the video amplifier is
automatically set according to the brightness
of the subject.
In this case, the [GAIN L/M/H] selection
switch on the camera recorder is disabled.
0
The
a
icon appears on the screen.
Memo :
0
The upper limit of the gain setting value during
ALC operation can be set in [Main Menu]
B
[Camera Function]
B
[ALC Limit].
(
A
P109 [ ALC Limit ] )
0
When [Camera Function]
B
[FULL AUTO]
B
[Gain] is set to “SW Set”, the gain value can be
altered using the [GAIN L/M/H] selection switch
even when the [FULL AUTO] switch on the
camera body is set to “ON”.
(
A
P113 [ Gain ] )
0
You can switch to the Auto Gain mode by setting
the items in [Camera Function]
B
[GAIN L],
[GAIN M], and [GAIN H] to “ALC”.
(
A
P109 [GAIN L/GAIN M/GAIN H] )
Adjusting the Iris
59
Sh
ooting