JVC GYHD110U Instructions - Page 25

PREPARATIONS FOR OPERATION Back Focus Adjustment 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). 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 tele- photo 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. Siemens star chart 44 White Balance Adjustment Iris mode switch ND filter AWB button WHT.BAL switch POWER switch During operation Result message Improper object Insufficient illumination Excessive illumination CAUTION • Do not adjust using any highly reflective objects, such as metal, etc., as this may result in improper white balance adjustment. • The FAW (Full 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 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. PREPARATIONS FOR OPERATION 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. „ White Balance Adjustment Two kinds of white balance adjustment results can be stored in memories AUTO A and AUTO B. „ Adjustment procedure 1. Set the following switches. • Set the POWER switch to ON. • Set the IRIS mode switch of the lens to A (Auto). • Set the FULL AUTO switch to OFF. 2. Set the ND filter switch according to the current lighting. 3. Set the WHT.BAL switch to A or B. 4. Place a white object near the center of the screen under the same lighting conditions as the target subject and zoom in to fill the screen with white. 5. Press the AWB (Auto White Balance) button. "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. „ Error messages If the adjustment ends abnormally, an error message, as described below, blinks for about 5 seconds. • NG: OBJECT (Improper object) 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 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 SWITCH MODE menu screen. The FAW function can be allocated to one of the white balance switching switches A, B, or PRESET. X See page 71. 45