14
(5)
SHUTTER
Electronic shutter speed adjustment
-Shutter mode-
MANUAL
:
The
shutter
speed is variable.
AUTO
: The shutter speed is always adjusted automatically for proper video level when excessive light
has entered.
This mode is effective when using microscope or other optical system without an
automatic lens iris.
OFF
: The shutter speed is fixed in 1/15 sec (HV-F22) or 1/30 sec (HV-F31).
Setting value
2005xxF8
h xx: 03h- MANUAL, 05h- AUTO, 00h- OFF
-Manual adjustment-
Shutter speed adjustment is available on MANUAL mode.
Setting value
3038xxxx
h
xxxx: FFC5h to 036Ch signed (HV-F22)
FF89h
to
0327h
signed
(HV-F31)
Electronic shutter speed can be set in the range of 4 to 1/100,000 second.
Shutter speed is calculated as follows.
Note: “OFF_VALUE” equals to 15 in HV-F22 or 30 in HV-F31.
1) In the case that shutter speed is equal to (1 / OFF_VALUE) or shorter
Calculate value from exposure time
nnnnh = log
0.99
( OFF_VALUE× ”Shutter Speed” )
Exp) Exposure time = 1/100 sec (for HV-F31CL)
Value:nnnn = log
0.99
(30×(1/100))
= log(30×(1/100)) / log0.99
≒
0078h