JVC GY-DV500U GY-DV500 User Manual - PDF (4,089KB) - Page 80

13. FEATURES OF THE CAMERA SECTION 13-2 IRIS (Brightness) Adjustment ADJUSTMENT OF LENS IRIS Iris ring RET M A W T Temporary auto iris button Iris mode switch The lens iris can be adjusted using any of the following three methods. • Automatic adjustment Set the iris mode switch to "A" (Auto). The iris is adjusted automatically according to the brightness of the object. • Manual adjustment Set the iris mode switch to "M" (Manual). The iris can be adjusted manually by rotating the iris ring. • Temporary auto iris adjustment During manual iris adjustment, the auto iris adjustment mode is activated only while this button is held depressed. Ⅲ Changing the auto iris adjustment setup Under special lighting conditions such as backlight, it is often appropriate to change the value set by the auto iris adjustment. This can be done by the following methods. • Setting the AUTO IRIS LEVEL switch of the camera  See "SWITCH FUNCTIONS" on page 83. ZEBRA PATTERN DISPLAY DURING MANUAL ADJUSTMENT OFF ZEBRA SKIN ON AREA AUTO WHITE ACCU FOCUS VTR AUDIO LEVEL CH-1 TAKE ZEBRA switch By setting the ZEBRA switch to ON, oblique stripes (zebra pattern) can be displayed in the sections with a luminance level of 70% to 80% or sections with levels over 100% in the viewfinder. The zebra pattern can be used as a reference for manual iris adjustment. When adjusting the iris manually, adjust it so that the zebra patterns are displayed in the section that you want to stress in the subject. • The initial setting is 70 to 80%. However, using the "ZEBRA" setting on the VF DISPLAY MENU, zebra patterns can be displayed in the sections with a luminance level of 85 to 95%, over 95% and over 100%.  See "VF DISPLAY MENU Screen" on page 72. 80