13. FEATURES OF THE CAMERA SECTION

13-2 IRIS (Brightness) Adjustment

ADJUSTMENT OF LENS IRIS

Iris ring

RET

M

 

A

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.

W T

Temporary auto iris button

Iris mode switch

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 90.

ZEBRA PATTERN DISPLAY DURING MANUAL ADJUSTMENT

PUSH

OFF ZEBRA

ON

SKIN

AUTO

AREA

WHITE

 

 

 

ACCU

 

 

FOCUS

 

VTR AUDIO

TAKE

 

LEVEL CH-1

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.

When CHARACTER of the Camera SETUP Menu screen is set to ON, the zebra pattern will also appear in the MONITOR OUT connector video.

The zebra pattern will also appear during color bar output when the ZEBRA switch is set to ON.

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 78.

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JVC GY-DV550U Iris Brightness Adjustment, Adjustment of Lens Iris, Zebra Pattern Display During Manual Adjustment