Canon VB-S30D User Manual - Page 44
Subjects Difficult to Focus On, Camera Control, Day/Night when Auto is set, Digital Zoom], AGC Limit]
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• 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. 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 (Shutterpriority AE)] (p. 135). 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. • 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 Page] > [Event] > [External Device Input] (p. 57) or [Event] > [Timer] (p. 58). 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 A white wall or other A slanting subject lacking subject bright/dark contrast A subject reflecting strong light A subject consisting of only slanted lines or horizontal stripes A subject having no form, such as flame or smoke A subject seen through glass A fast moving subject A dark area or night view Subjects both near and far • 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. Focus Mode Auto Fixed at infinity Day Mode/Night Mode Max. Wide-angle Max. Telephoto 0.3 m (12 in.) - infinity 0.3 m (12 in.) - infinity Focused at infinity 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]. 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. 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. 44
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