JVC TK-C1481  Back focus adjustment, With a fixed-focus lens, Lens Focus Adjustment Mode

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Back focus adjustment

Back focus adjustment

Be sure to make back-focus adjustments when changing the lens mounting method or using a different lens. If required, adjust it as follows:

Back focus adjusting ring

Tighten

Loosen

 

C

BF

LO

 

 

Back focus fixing screw (M2.6)

Lens focus ring

With a fixed-focus lens

If the focus can not be adjusted correctly by rotating the lens focus ring, adjust the back focus as follows.

1. Loosen the back focus locking screw by turning it counterclocckwise ( ) with a screwdriver.

2. Shoot a pattern closely.

3. Turn the lens focus ring to ￿.

4. Turn the back focus adjustment ring to focus at the best point.

5. Tighten the back focus locking screw by turning it clockwise ( ).

MEMO

LENS FOCUS ADJUSTMENT MODE

At the time of focus adjustment, press the button at the side of the unit for at least one second to open the lens iris and to fa- cilitate focusing. At this time, “LENS FOCUS ADJUSTMENT MODE” will be displayed on the monitor screen.

When the adjustment has been completed,

press one of the buttons to can- cel focus adjustment mode.

Focus setting can differ on the color and on the black and white screen. Make adjust- ments so that the focus will come to the op- timum on both screens.

MEMO

When the subject is bright, the use of an ND filter permits more accurate back-focus ad- justment. (The ND filter reduces the amount of incident light upon the lens equally over the entire range of wavelength.)

With a zoom lens

If the image is out of focus when zooming (telephoto wide-angle), adjust the camera as follows:

1. Loosen the back focus locking screw by turning it counterclocckwise ( ) with a screwdriver.

2. Shoot a comparatively dark scene with thin lines.

3. Set the lens to the maximum telephoto position, and adjust the lens focus.

4. Set the lens to the maximum wide-angle position, and turn the back focus ring to adjust the focus.

(Repeat steps 3. and 4. two or three times.)

5. Tighten the back focus locking screw by turning it clockwise ( ).

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Contents TK-C1480 TK-C1481 Important Safeguards Page Safety Precautions Contents Features Memo Reference page or item Operating Precautions Lens mount Controls, Connectors and IndicatorsCamera-mounting screw hole 1/4 inch Rotation-preventive holeCover VIDEO/DC Iris Selector SwitchIris Iris Terminal Menu Menu ButtonDUPLEX, Simplex Selector Switch for Transmission System 15 INT/GL, LL Selector Switch for Synchronizing System17 RX.TERM-ON/OFF RX SignalTerminal ON/OFF Switch 13 , , , Up-and-down, left-and- right ButtonVideo OUT Video signal output connector 22 Y/C OUT Y/C output connectorPower Power indicator lamp Power cable TK-C1481EG System with up to 8 cameras RM-P2580 System Setting the switches   Connecting the control signal cable Setting on the Menu screen  When connectingSetting the switches ProceduresThis is the connected example of the TK-C1480U or TK-C1480E TK-C1481EG DC Iris Video Iris Mounting the lensVideo GND Power supply Connections on the backTK-C1481EG AC230V  Genlock connection  Control signal cablesMounting the camera Fall PreventionSpecified screw M3 ⋅ 6 mm Installation of camera Lens adjustment Level adjustmentDoes not operate  Back focus adjustment Back focus adjustmentLens Focus Adjustment Mode With a fixed-focus lensError message display Auto white balance control adjustmentMenu screen is displayed Setting the menuSelected sub-menu screen is displayed Change of the set value displays a change mark ∗Word Colour is displayed as Color on the TK-C1480U Flow of menu screenTK-C1480U does not display these characters Sync Adjust Screen ALC Settings ScreenFunctions and set values Initial value Shutter ExDRSpeed Memo Motion PriorityBLC OFFVideo Adjust Screen Motion Detect Screen Mode Select ScreenArea Edit Alarm TimeCommunication Screen Factory Settings ScreenBLC Editting Screen Manual Adjustment of White Balance Screen returns to Mode Select Camera Title SettingThen, the Camera Title screen is brought up Selected character is displayed flashing on and offSetting screen is brought up Setting the Motion Detect FunctionSelect the item Area Edit on Motion Detect screenInstalling the ferrite core SpecificationsDimensions Unit mm Composite video signal 1 V p-p, 75Ω BNC Video OUTOUT Colour Video Camera