Adjusting the iris, Setting gain, Manual iris (manual adjustment) mode – JVC GY-HM700U User Manual
Page 41: Auto iris (automatic adjustment) mode, Fixed gain mode (manual gain switching), Automatic gain mode (automatic gain adjustment)
37
You can adjust the aperture of the lens iris manually or
automatically according to the brightness of the object.
Manual Iris (Manual Adjustment) Mode
Set the [IRIS] switch on the lens to
AMB to enter Manual Iris
Mode.
Turn the iris ring on the lens to adjust the iris manually.
Memo :
● Even during Manual Iris Mode, the camera recorder enters
forced Auto Iris Mode while the [IRIS AUTO] button is
pressed.
Auto Iris (Automatic Adjustment) Mode
Set the [IRIS] switch on the lens to
AAB to enter Auto Iris
Mode. The iris is automatically adjusted according to the
brightness of the object.
Or, set the [FULL AUTO] switch on the camera recorder to
AONB to enter Auto Iris Mode. The iris is automatically
adjusted according to the brightness of the object.
Memo :
● When [Iris Control] in the [Camera Function...]B[FULL
AUTO...] menu is set to
AOffB, you can adjust the iris
manually even if the [FULL AUTO] switch on the camera
recorder is set to
AONB. (A Page 75)
● You can use the cross-shaped button (
H
,
I
) on this camera
recorder to set the target level (brighter/darker) of the auto
iris. You can also use the menu to set the tracking sensitivity
of the auto iris. (
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.
Fixed Gain Mode (Manual Gain Switching)
You can select the gain of the video amplifier using the
[GAIN] switch on the camera recorder.
The default positions of the switch are as follows.
Memo :
● The gain value of each position can be set to AALCB and
within the range of
A0dBB to A18dBB (in increments of 3 dB)
in the menu. Increasing the sensitivity causes the screen to
appear grainier. (
Automatic Gain Mode (Automatic Gain
Adjustment)
Set the [FULL AUTO] switch on the camera recorder to
AONB
to enter Automatic gain Level Control (
AALCB fixed). The
gain of the video amplifier is automatically set according to
the brightness of the object.
In this case, the [GAIN] switch on the camera recorder is
disabled.
Memo :
● When [Gain] in the [Camera Function...]B[FULL AUTO...]
menu is set to
ASW SetB, you can switch the gain with the
[GAIN] switch even if the [FULL AUTO] switch on the camera
recorder is set to
AONB. (A Page 75)
Adjusting the Iris
RET
IRIS
A
M
W
T
[IRIS] Switch
Iris Ring
Setting Gain
[L] : 0 dB (No electrical boosting.)
[M] : 9 dB (Boosts sensitivity by about 2.8 times.)
[H] : 18 dB (Boosts sensitivity by about 8 times.)
[GAIN] Selection
Switch
[FULL AUTO]
Switch