JVC GY-HM700UXT 132 page operation manual for the GY-HM700 solid state camcord - Page 46

Shooting Adjusting the White Shading You need to adjust white shading when you change the lens. Even if white balance is adjusted in the center of the screen, the top and bottom of the screen may not be adjusted. In this case, green and yellow colors may appear on the screen. This is due to the characteristic of the lens. Correcting this phenomena is known as white shading adjustment. Perform this adjustment after adjusting the white balance. [MENU] Button Cross-Shaped Button (JK) Set Button (R) C Select the item to change with the cross-shaped button (JK) and press the Set button (R). D Change the setting value with the cross-shaped button (JK) while looking at the evaluated value at the bottom right of the LCD monitor or viewfinder screen. ● If the evaluated value of the adjusting channel is larger than 0, use the cross-shaped button (K) to change the setting value so that the value is more or less AEvenB. Similarly, if the value is smaller than 0, use the crossshaped button (J) to change the setting value. (A Page 42 [Evaluated value]) [R] Red adjustment [G] Green adjustment [B] Blue adjustment (Adjustment range : Min (-128) to Normal to Max(127)) Memo: ● There may be some delay in the changes of the evaluated value after pressing the cross-shaped button (JK). ● Increasing the setting value suppresses the colors at the bottom and enhances the colors on top. E Press the Set button (R) to save the settings after the changes are complete. F Select [Back] and press the Set button (R) to return to the [White Balance] menu. Top CD 1 Fill the monitor screen with a pattern box of uniform light source or white (plain) paper shone with uniform lighting. 2 Set the control of the camera lens as follows. A Set the aperture to F4 or more such that the iris achieves optimum brightness. If the brightness is insufficient even at F4, set to the optimum brightness by increasing the lighting. B When using zoom lens, set to the center of the zoom adjustment range. 3 Adjust the white balance of the camera recorder. (A Page 40 [Memory A Mode (A), Memory B Mode (B)]) 4 Set the chroma level of the monitor to the maximum. 5 Check the monitor screen. ● There is no need for adjustment if there is no color at the top and bottom of the screen. ● If the top of the screen is greenish and the bottom is reddish or vice versa, continue this adjustment. 6 Adjust the white shading. It is recommended to adjust only G (green). A Set [Main Menu]B[Camera Process]B[White Balance]B[Shading Mode] to AManualB. (A Page 79) B Select [Adjust] in the [White Balance] menu and press the Set button (R). F Evaluated Value Btm Evaluated Value Detection Frames 7 Press the [MENU] button to return to the normal screen. 8 Readjust the white balance. (A Page 40) Note: ● If the lens setup is incorrect, you may over-correct the white shading. Set to the recommended settings for the lens. (Do not open the iris more than F4. Do not adjust the zoom lens at the telephoto or wide angle end.) ● White shading occurs as a result of the optical characteristic of the attached lens. This is not a camera malfunction. Evaluated value A value that compares the average values of the R, G, B channels in the evaluated value detection frames at the top (Top) and bottom (Btm) of the LCD monitor or viewfinder (difference between [Top] and [Btm]). If [Top] is larger than [Btm], a negative value is displayed. If [Top] is smaller than [Btm], a positive value is displayed. When there is no difference between [Top] and [Btm], AEvenB is displayed. Set such that the evaluated value is more or less AEvenB. 42