JVC GY-DV5100 instruction manual Back Focus Adjustment, White Balance Adjustment

6. SETTING AND ADJUSTMENTS BEFORE SHOOTING

6-5 Back Focus Adjustment

6. SETTING AND ADJUSTMENTS BEFORE SHOOTING

6-6 White Balance Adjustment

3. 4. 6. 5.

RET	M
	A

WT

It is only necessary to perform this when the lens is attached for the first time or when focusing is not correct in both the telephoto and wide-angle positions.

It is easier to adjust back focus when the subject is more than 3 meters from the camera.

The optimal subject for this adjustment is a Siemens star chart.

1. Set the IRIS mode switch to M (Manual).

2. Set the zoom mode to M (Manual).

Since the color of light (color temperature) varies depending on the light source, it is necessary to re-adjust the white balance when the main light source illuminating the subject changes.

Note

When a subject illuminated by a halogen lamp with a color temperature of 3,200K is shot while the color temperature conversion filter setting is set to 5,600K, 5,600K+1/8 ND, or 5,600K+1/64 ND, a proper white balance adjustment and (FAW) Full Time Auto White balance may not be accomplishable. In this case, change the color temperature conversion filter setting to 3,200K and then carry out the white balance adjustment and (FAW) again.

●Do not adjust using any highly reflective objects, such as metal, etc., as this may result in improper white balance adjustment.

WHITE BALANCE ADJUSTMENT	Two kinds of white balance adjustment results can be stored in
2. FILTER knob	memories AUTO1 and AUTO2.

1.

MACRO

2.7. 8. 10.

3. Open the iris by turning the iris ring. If the illumination is too

strong, reduce it or move to a darker place.

4. Turn the zoom lever until the lens is at the maximum

telephoto position.

5. Bring the subject into focus.

6. Set the lens to maximum wide-angle.

7. Loosen the back focus ring retaining knob.

8. View the same subject and adjust the back focus ring for

the best possible focus.

9. Repeat steps 4. through 8. about three times for fine

adjustment until the subject remains in focus in both the

telephoto position and the wide-angle position.

10.Tighten the back focus ring retaining knob to secure the

ring.

1.Iris mode switch

AUTO WHITE A

OPERATION

During operation

	3.WHT.BAL
	switch
	1. OUTPUT
	switch
5. AUTO WHT.	1. POWER
/ACCU FOCUS switch	switch

AUTO WHITE A

OK <3200K>

Result message

Adjustment procedure

1.Set the following switches.

●Set the POWER switch to ON.

●Set the OUTPUT switch to CAM-AUTO KNEE.

●Set the IRIS mode switch of the lens to A (Auto).

2.Set the FILTER knob according to the current lighting.

3.Set the WHT.BAL switch to A or B.

4.Place a white object near the centre of the screen under the same lighting conditions as the target subject and zoom in to fill the screen with white.

5.Tilt the AUTO WHT./ACCU FOCUS switch upward (to AUTO WHITE) once and release it.

“AUTO WHITE A, B OPERATION” is displayed in the viewfinder while the auto white balance adjustment circuit operates.

When correct white balance is obtained, the approximate color temperature is displayed together with “AUTO WHITE A, B OK” for about 5 seconds.

MEMO:

ACCU FOCUS can also be used in the above step 3.

AUTO WHITE A

NG:OBJECT

AUTO WHITE A

ERROR:LOW LIGHT

Error messages

If the adjustment ends abnormally, an error message, as described below, blinks for about 5 seconds.

● NG: OBJECT (Improper object)

Siemens star chart

Improper object

AUTO WHITE A

ERROR:OVER LIGHT

Excessive illumination

Insufficient illumination

Displayed when there is not enough white color on an object

or the color temperature is not suitable.

Replace the color temperature conversion filter or use another

white object and re-adjust the white balance.

● ERROR: LOW LIGHT (Insufficient illumination)

Displayed when the illumination is dim. Increase the

illumination and then re-adjust the white balance.

● ERROR: OVER LIGHT (Excessive illumination)

Displayed when the light is excessively bright. Decrease the

illumination and then re-adjust the white balance.

FULL-TIME AUTO WHITE BALANCE (FAW)

The FAW function adjusts the white balance value automatically as the lighting condition changes.

This mode is convenient when you have no time to adjust the white balance or when the camera is moved frequently in and out of places under different lighting conditions.

■Setting procedure

The FAW function can be activated with the FAW item on the CAMERA OPERATION menu screen. The FAW function can be allocated to one of the white balance switching switches A, B, or PRESET.

☞ See “CAMERA OPERATION menu screen” on page 75.

CAUTION:

●The FAW (Full-time Auto White balance) function cannot provide optimum white balance with a subject outside the FAW adjustment range, for example when it contains only a single color or not enough white color.

●The accuracy of the FAW (Full-time Auto White balance) is inferior to that of the Auto white balance.

●When the power is turned on with the FAW mode selected, it takes about 10 seconds for the FAW adjustment to be completed. Do not shoot within this interval.

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