JVC LYT0244-001A, GR-DVF20 manual Iris Lock, EN37, Center SUBJECT, Lock Iris

Select Dial		Power Switch
Display
FOCUS	AUTO	Manual Mode Item
EXPOSURE	MANUAL	Menu
W. BALANCE	AUTO
FADER	OFF
/ WIPE
P. AE	OFF
/ EFFECT
4RETURN
EXP.
0 L

Iris lock indicator

EN37

Iris Lock

Use this function when shooting a moving subject, when zooming, when the subject changes its distance (thus its size in the LCD monitor or the viewfinder), or when you want to lock the brightness level.

When the subject is close, keep the iris locked. Even when the subject moves away from you, the image will not darken or brighten.

1	SELECT OPERATION MODE
	Set the Power Switch to “PRO.”.
2
	ACCESS MANUAL MODE ITEM MENU
	Press the Select Dial. The Manual Mode Item Menu
	appears.
3
	ACCESS EXPOSURE CONTROL
	Move the highlight bar to “EXPOSURE” by rotating
	the Select Dial and then press it. Rotate the Select
	Dial to display “MANUAL”, then press it. “EXP.” is
	displayed.
4
	CENTER SUBJECT, LOCK IRIS	RECORDING
	Adjust zoom so that the subject fills the LCD monitor
	or the viewfinder, then press and hold the Select Dial
	for over 2 seconds. The exposure control indicator
	and “ L ” appear, indicating that the iris is locked.
	Press the Select Dial. The indication displayed in the
	upper left corner changes from “EXP.” to “PRO.”.
To Return To Automatic Iris Control . . .
.... rotate the Select Dial to display “AUTO” then press it
in step 3. The exposure control indicator and “ L ”
disappear. Or set the Power Switch to “AUTO”.

NOTE:

Iris lock is recommended in the following situations:

●When shooting on a reflective natural background such as at the beach or when skiing.

●When shooting objects under a spotlight.

●When the subject is backing away.

●When zooming.

To Lock The Exposure Control And The Iris . . .

.... after step 3, adjust the exposure rotating the Select

Dial. Then lock the iris in step 4. For automatic locking, rotate the Select Dial to display “AUTO”, then press it in step 3. The iris becomes automatic after about 2 seconds.

Iris

Works like the pupil of the human eye. In a well-lit environment, the human pupil contracts to keep too much light from enterintg. In low lighting, the pupil dilates to allow more light in.