Changing The Reference Value For Automatic Iris Adjustment - Sony PMW-500 Operation Manual

Changing the Reference
Value for Automatic Iris
Adjustment
The reference value for automatic iris adjustment
can be changed to aid the shooting of clear
pictures of back-lit subjects, or to prevent blown-
out highlights. The reference value for the lens
iris can be set within the following range with
respect to the standard value.
• 0.25 to 1 (increasing by increments of 0.25):
About 0.25 to 1 stop further open
• –0.25 to –1 (decreasing by increments of 0.25):
About 0.25 to 1 stop further close
Also you can set the area where light detection
occurs.
To change the reference value
1
Set OPERATION >Auto Iris >Iris
Override in the setup menu to On (see
page 121).
2
Set the MENU ON/OFF switch to OFF.
3
Turn the MENU knob to change the
reference value.
Note
Be sure to confirm that the current shutter mode is
not ECS.
An indicator of the current reference value is
shown at the iris position indication (see
page 32) on the viewfinder screen.
To make the iris more open
Turn the MENU knob counterclockwise as
seen from the front of the camcorder.
Select one of 0.25, 0.5, 0.75, or 1.
To stop down the iris
Turn the MENU knob clockwise as seen
from the front of the camcorder.
Select one of –0.25, –0.5, –0.75, or –1.
The changed reference value is retained until
the power of the camcorder is turned off.
Even if the reference value is changed, it
reverts to the standard value every time the
power is turned on.
To set the automatic iris window
1
Set OPERATION >Auto Iris >Iris
Window Indication in the setup menu to
On.
The current automatic iris window appears
on the viewfinder screen.
If it is not necessary to display the auto iris
window on the screen, set to Off.
2
Turn the MENU knob to select Iris
Window, and then press the knob.
3
Turn the MENU knob until the desired
auto iris window appears, and then
press the knob.
If you select "Var", the following items
become effective and you can set the window
of the desired size. Set the following items
with MAINTENANCE >Auto Iris2.
Item
Iris Var Width
Iris Var Height
Iris Var H Pos
Iris Var V Pos.
When you exit the menu, the auto iris window
selected in step
Unless you need to keep this window displayed,
set OPERATION >Auto Iris >Iris Window
Indication in the setup menu to Off.
To counter problems with very bright
highlights
If the subject is too bright, the iris may close too
much, leaving the overall image dark, or the
highlights may be blown out. In such cases,
setting the highlight clip function on reduces the
luminance range, avoiding problems from the
automatic iris correction.
Set OPERATION >Auto Iris >Clip High Light in
the setup menu to On.

Changing the Reference Value for Automatic Iris Adjustment

The shaded parts indicate the
area where light detection
Setting
The width of the window
The height of the window
The position of the window
in the horizontal direction
The position of the window
in the vertical direction.
3
appears.
57