Easy D/N
IR ON/OFF
Focus
Adjustment
Vandal
Resistant
Object camera: TK-C205U(A) [P.5] and VN-C205U(A) [P.2 3]
Object cameras: TK-C925U [P.3 ], TK-C1530U [P.3 ], TK-C215V4U(A) [P.6 ],
TK-C215V12U(A) [P.6], TK-C215VP4U [P.7 ] and TK-C215VP12U [P.7 ]
Object cameras: TK-C215VP4U [P.7 ] and TK-C215VP12U [P.7 ]
IR cut filter on/off function
4
IR cut filter makes it possible to capture both color, black and white
images with just one camera. This is done by turning the filter to "ON"
when shooting in sunlight during the day for color images and turning it to
"OFF" at night for black and white images. Therefore continuous twenty-
four-hour surveillance is possible thanks to this function.
* Noise will briefly occur on the screen when switching to the IR cut filter.
Easy day/night function
5
Camera uses color mode when the object is bright, and black and white
mode when it is dark. (In this mode, AGC is always active regardless of
the setting.)
Spectral sensitivity characteristics of the CCD
400
1.0
0.5
0.0
500 600 700 800 900 1,000
IR range (B&W images)
Wavelength (nm)
New CCD
New CCD + IR cut filter
Conventional CCD
Sensivity
Visible light range (color images)
Morning Day light High contrast Evening Night time
B&W mode AGC
more than 3.5 dB
AGC mode
AGC mode
AGC mode
Auto tracking white balance (ATW)
color
B&W
color
Auto iris
normal mode
Auto iris
normal mode
Easy day/night
off
Easy day/night
on
color signal
off
Focus adjustment function
6
By turning the focus adjustment function to "ON" when adjusting the focus,
the lens iris is forcibly opened and the zone of acceptable focus (depth of
field) becomes shallow (i.e. the zone of acceptable focus narrows). This
enables more accurate focusing than would be possible under ordinary
conditions. Once the necessary adjustments have been made and the
function has been turned to "OFF", the iris returns to its optimal state.
Depth of field Shallow Deep
Lens Tele angle Wide angle
Exposure Open Narrow
Position of object Close Far
What is depth of field ?
When a video is taken with the lens focused on the main object, there is
a zone in which objects both in front of and behind the main object
appear to be in focus. This zone is referred to as the "depth of field".
When the zone of acceptable focus is broad, the depth of field is said to
be "deep", and when the zone is narrow, the depth of field is said to be
"shallow". If the depth of field is deep, the video will appear to be in
focus from front to back. If the depth of field is shallow, however, only
the main object will actually
be in focus.
When the focus adjustment function is turned "ON", the lens iris is focused
fully open for about 30 seconds before returning to its original position. This
results in a shallow depth of field (high-speed shutter) and makes it much
easier to adjust focus.
Object cameras: TK-C925U [P.3 ], TK-C1530U [P.3 ], TK-C1460U [P.4], TK-C625U [P.8 ],
VN-C625U [P.24 ] and VN-C655U(B) [P.2 5 ]
Object cameras: TK-C920U(A) [P.2 ], TK-WD310U(B) [P.5 ], TK-C205U(A) [P.6],
TK-C215V4U(A) [P.6 ], TK-C215V12U(A) [P.6 ], TK-C215VP4U [P.7],
TK-C215VP12U [P.7 ], VN-C20U [P.2 3 ], VN-C205U [P.2 3] and VN-V215V4U [P.24 ]
Vandal resistant
7
After performing this standard test the dome cover did not sustain any
cracking. The test was repeated with twice the initial test weight and again
there was no evidence of cracking.
Weight twice times
Weight: 7.2 kg
Height: 1.83 m
OK
Weight 1.5 times more
Weight: 5.4 kg
Height: 1.83 m
OK
Weight: 3.6 kg
Height: 1.83 m
OK
Results
Iron pole
Weight 8 lbs. (3.6 kg)
Diameter 2 inches (5 cm)
Height 1.83 m
37JVC Video Surveillance Products 2006-2007
Technical Information http://pro.jvc.com
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