CONNECTORS AND CONTROLS
Switch
This switch is used to select EE (electronic exposure or
electronic light control) mode or Al (autoiris lens or ALC-automatic
light control) mode.
In the EE mode, a continuously variable electronic shutter is
employed to automatically control the exposure time of the CCD
image sensor according to the incoming light level. With this mode
selected, a fixed or manual iris lens can be used instead of an
lens. In the Al mode, the CCD shutter speed is fixed to
and the incoming light level is controlled by the
lens.
To use a video-drive type or the DC-drive type of
lens, set
this switch to the Al position.
Cautions :
Under bright lighting conditions such as outdoors, use an
lens because the ELC control range is not wide enough
under these conditions.
2. Under certain unique lighting conditions, the following
phenomena may appear:
. Strong smear and/or blooming on highlight objects such as
spotlights or windows.
. Noticeable flicker in the picture and/or color rendition
variations.
To avoid this, use an
lens.
3. When operating in EE mode with a manual iris lens, the depth of
field of the image may be less than that obtained by using an
ALC lens. Depth of field varies inversely with the iris opening.
Thus, using this camera in EE mode with the manual iris lens
fully opened may result in less depth of field and the distant
objects in picture may be seen out of focus.
4. Fixed iris or manual iris lenses may be used with the linear
shutter (EE mode) where the scene brightness varies over a
limited range.
5. Do not use the EE mode when an
lens is installed.
