Canon 2812B015 用户手册

Setting the Camera Control and External Device Name (Camera)

Det

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z Auto focus may not work properly with the following subjects: 

z The focus ranges (rough guide) are shown in the table below according to the settings of 

[Day/Night], etc.

z When it is difficult to focus on a night view or other subject having no contrasting bright/

dark areas, it is best to set the focus mode to "Fixed at infinity."

A white wall or other subject 
having no contrasting 
bright/dark areas 

A slanting subject

A subject reflecting 
strong light 

A subject consisting 
only of slant 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 

A subject that is 
simultaneously far and 
near 

Point of infinity

Note) The camera may be out of focus.

Day/Night setting

Day mode

Night mode

Dome

Infrared lamp

Wide end

Tele end

Wide end

Tele end

Auto

Not used

None

0.3m~

∞

1.5m~

∞

0.5m~

∞

1.8m~

∞

Used

None

2.1m~

∞

2.4m~

∞

Not used

Yes

0.5m~

∞

1.8m~

∞

Used

Yes

0.5m~

∞

2.4m~

∞

Fixed at infinity

None

Point of infinity

Yes