Iris adjustment

Auto, manual and instant auto are selectable. Instant auto functions during manual operation to adjust the iris automatically while the button is pressed.

1.Automatic

Set the lens Iris switch to A. The iris is adjusted automatically to accommodate camera video signal changes.

2.Manual

Set the switch to M. The iris is adjusted by manually turning the iris ring.

3.Instant automatic

With the Iris switch at M, pressing the button instantly and automatically adjusts the iris.

Notes

1Set the iris response (peak/average) from the Function 1 menu screen.

2While the menu screen is not displayed, fine adjust the auto iris by pressing the

The adjustment range using the buttons is indicated below.

buttons.

 

 

 

 

 

 

 

 

 

 

-1.0 -0.8 -0.6 -0.4 -0.2 0 +0.2 +0.4 +0.6 +0.8 +1.0

 

 

 

 

Closed about 1 F stop.

 

 

 

 

Opened about 1 F stop.

The adjustment can be used if portions of interest in the scene are too dark or too light.

IRIS:0

Viewfinder screen

3Zebra pattern

When set to on, a zebra pattern appears on the viewfinder screen. The pattern can be used as a reference for manual iris adjustment.

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Hitachi V-21W operating instructions Iris adjustment, Automatic, Manual, Instant automatic