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5.5.3 Iris /
compensation shutter angle
The iris can be manually adjusted within the pre-defined
end-stops of the handwheel (master value: Iris).
The exposure is automatically compensated for with the
mirror shutter angle. The visible depth of field can be
altered with this function.
The first line of the main menu shows the shutter angle,
which is automatically calculated within the pre-defined
limits. The second line shows the currently adjusted T-stop
of the lens using the handwheel.
The display shows full T-stops followed by the tenth of a
T-stop. Example: T-stop 2.8 plus half a T-stop is shown as
2.8_5. The tenths of a T-stop are linearly divided between
the two full T-stop positions.
Note The following warnings may be displayed:
‘IRIS TBL’ – a valid iris table has not yet been
activated;
readings with ‘NO’ in the first display line
indicate that the selected function is currently
not available (examples: ‘NO IRIS’ although the
iris control is activated on the WRC-1, the iris
motor has not yet been connected. The connected
camera does not have an electronically adjustable
mirror shutter);
readings with ‘RANGE’ in the second display line
indicate that the adjustment range of a parameter
has been exceeded (example: the selected speed
cannot be attained with this camera);
readings with ‘OFF’ in the first display line
indicate that this function is deactivated on the
camera (example: shutter angle of the 435 is
set manually = ‘OFF ANGLE’).
Correct parameters must be set before the
camera is started!
Note: To check the image in the viewfinder, the iris
can be opened completely by pressing the
OPEN button.
The iris remains open until the OPEN button is
released again.
This does not alter the programmed settings.
The OPEN button is without function while the
camera is running.
By pressing the SET button the currently set camera speed
can be shown in the second display line.
Controlling the Iris