Canon vb-s31D Mode D’Emploi
44
Note
• Focusing may be difficult for the following types of subjects
when [Focus] is set to [Auto] or [One-shot AF].
Subjects Difficult to Focus On
• After rebooting the camera, it is recommended that you check
whether the camera is focusing correctly.
• The focus ranges (approximate) are shown in the table below.
Camera Control
(1) [Digital Zoom]
Set digital zoom to [Disable] or [Enable].
The higher the digital zoom ratio, the lower the video
quality becomes.
(2) [AGC Limit]
Select one of 5 levels from 1 to 5 to automatically set
the upper gain limit. The greater the value, the higher
the sensitivity becomes. If you do not want to use the
automatic gain adjustment, select [OFF]. Setting
[AGC Limit] allows you to reduce noise when
capturing video in low illumination.
(3) [Smart Shade Control Strength (Auto)]
Select [Mild], [Medium], or [Strong] for the control
strength when [Smart Shade Control] (p. 43) is set to
[Auto].
Day/Night (when Auto is set)
(1) [Switching Brightness]
Set the brightness at which Day Mode and Night
Mode will be switched when [Auto] is selected in
[Day/Night]. Select [Darker], [Slightly Darker],
[Standard], [Slightly Brighter] or [Brighter]. Select
[Darker] if you want to capture video in color as much
as possible.
Select [Brighter] to reduce noise. Note that this mode
switches to black & white sooner.
(2) [Response (sec.)]
Set the time in seconds needed for judgment on
switching between Day Mode and Night Mode when
[Auto] is selected in [Day/Night]. Select [60], [30],
[20], [10] or [5].
The mode will switch between Day Mode and Night
Mode if brightness remains above or below the level
set in (1) for the number of seconds specified.
• Even if [AE Mode] is set to [Auto (Flickerless)], some screen
flicker may still occur under unstable light source conditions.
• Setting a slow shutter speed may make it impossible for
intelligent functions to work correctly. Select a shutter speed
that suits the capture conditions and purpose.
•
In conditions where an outdoor scene is captured
from an indoor location through a glass window, the camera
may focus on the glass surface if there is dust or water there.
may focus on the glass surface if there is dust or water there.
Install the camera at the shortest possible distance from the
glass surface.
• If [Auto] is selected for [Day/Night], conduct a thorough
operation test to check the effectiveness of the setting
beforehand.
• If [Auto] is selected for [Day/Night], set [Exposure] of the
Admin Viewer to [Auto], [Auto (Flickerless)] or [Auto (Shutter-
priority AE)] (p. 135).
However, when [Auto (Shutter-priority AE)] is being used,
However, when [Auto (Shutter-priority AE)] is being used,
night mode may not be activated even if [Day/Night] is set to
[Auto], depending on the shutter speed.
• Though the camera has an infrared filter, there is no effect on
lighting due to infrared light as the camera does not have an
insertion/removal mechanism for the filter.
insertion/removal mechanism for the filter.
• When Day/Night Mode is set to [Manual], in addition to the
Day/Night function of the Admin Viewer (p. 137), it is also
possible to switch Day/Night Mode via settings in [Setting
A white wall or other
subject lacking
bright/dark contrast
subject lacking
bright/dark contrast
A slanting
subject
subject
A subject
reflecting
strong light
reflecting
strong light
A subject consisting
of only slanted lines
or horizontal stripes
of only slanted lines
or horizontal stripes
A subject having
no form, such as
flame or smoke
no form, such as
flame or smoke
A subject seen
through glass
through glass
A fast moving
subject
subject
A dark area or
night view
night view
Subjects both
near and far
near and far
Important
• [AGC Limit] is disabled when [Exposure] is set to [Manual] or
[Auto (Flickerless)] in the Admin Viewer.
• Minimum subject illumination may change when [AGC Limit]
is set.
Focus Mode
Fixed at infinity
Auto
Day Mode/Night Mode
0.3 m (12 in.) – infinity
0.3 m (12 in.) – infinity
Max. Wide-angle
Max. Telephoto
Focused at infinity