12. FEATURES OF THE CAMERA SECTION
| 12. FEATURES OF THE CAMERA SECTION |
| Gain (Sensitivity) Adjustment |
Outline
The gain should be switched when the brightness is insufficient due to poor lighting conditions. |
Band
Video monitor
POWER VTR
SHUTTER dial |
|
SHUTTER | VARIABLE |
FAW | A |
GAIN L | 0dB |
GAIN M | 6dB |
GAIN H | 9dB |
LOLUX GAIN | 30dB |
SMOOTH TRANS | OFF |
The following operation allows the alignment of the shutter speed of the camera with the variable scanning rate of a computer monitor or display. When a computer monitor screen or display is shot with the camera, a bright horizontal line indicating excessive exposure is displayed in cases when the scanning rate of the monitor is faster than the shutter speed of the camera. A dark horizontal line indicating insufficient exposure is displayed in cases when the monitor’s scanning rate is slower than the camera’s shutter speed. The scanning frequency of a monitor varies due to various reasons during the computer operation. Adjust the scanning rate to obtain a stable image while observing the image in the viewfinder or LCD monitor.
Variable Scan [V.SCAN]
• | Basic operation |
| Set the SHUTTER item on the CAMERA OPERATION menu |
| screen to VARIABLE. Then rotate the SHUTTER dial upward |
| or downward to change the shutter speed. |
| (The speed is displayed in the viewfinder or LCD monitor.) |
• | Compatible frequencies |
| The variable scan function is compatible with scanning |
| frequencies in the following range. |
| 60.1Hz to 2084.6 Hz |
CAUTION: This function is not compatible with
GAIN SWITCHING |
|
|
GAIN switch |
|
|
AUTO IRISFULL AUTOBLACK |
| LOLUX |
BACK L | STRETCH | MODE |
VTR | ||
NORMAL | NORMAL |
|
SPOT L
CAM
POWER VTR
ONOFF
CAUTION: When gain is set to “ALC”, gain is boosted automatically as the illumination becomes darker. However, noise will increase a little because the screen becomes brighter as the ALC (Auto Level Control) function boosts the gain more than in the case of manual adjustment.
This switch allows the gain to be boosted when the illumination | |
of the subject is insufficient. |
|
Switch Position |
|
L | 0dB |
M | 9dB |
H | 18dB |
When the GAIN switch is switched, the newly set gain is | |
displayed for about 3 seconds on the Status (0, 1, 3) screen in | |
the viewfinder or LCD monitor. |
|
Set it to L (0 dB) in normal use. |
|
■The gain set for each of the switch positions can be changed with “GAIN” on the CAMERA OPERATION menu screen.
It is also possible to use the ALC function that varies the gain automatically.
A setting at
☞See page 69 for details.
■The gain transition can be made smoother by selecting “SMOOTH TRANS” on the CAMERA OPERATION menu screen.
☞See page 69.
However, note that the SMOOTH TRANS function is not available if gain is set to ALC.
SPOT L/BACK L | MIDDLE |
ASPECT RATIO | 4:3 |
PAGE BACK |
|
GAIN BOOST UNDER LOLUX CONDITION
The LOLUX button is used when the illumination is still
CAMERA OPERATION menu screen
|
| LOLUX on/off button | ||
AUTO IRIS | FULL AUTO | BLACK |
| LOLUX |
BACK L |
|
| STRETCH | MODE |
|
| VTR | ||
NORMAL |
|
| NORMAL | |
SPOT L
CAM
POWER VTR
ONOFF
insufficient after compensating with the GAIN switch. Pressing the LOLUX button again will enter the LOLUX mode. The gain up value during the LOLUX mode is set in LOLUX GAIN of the CAMERA OPERATION menu. “LOLUX ON” is displayed for about 3 seconds on the Status (0, 1, 3) mode screen in the viewfinder or LCD monitor. Pressing the button again cancels the LOLUX mode. “LOLUX OFF” is displayed for about 3 seconds.
■When the LOLUX function is in use, the image definition on the screen will degrade to increase residual images, but this is not a malfunction.
Relationship between gain, iris and shutter |
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0.2 Lx | 8 Lx | 32 Lx | 2000 Lx | 4200 Lx | 18000 Lx | ||
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| FULL AUTO SHOOTING |
| 1/50 (E model) |
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36 dB | 12dB | 0 dB |
| 1/60 (U model) | 1/240 | ||
LOLUX |
| ALC |
| AUTOMATIC IRIS |
|
| EEI |
|
|
| F1.4 | F11 | F16 |
| |
82 | 83 |