User manual

Basic functions Functions
Version 1.5 18
5 FUNCTIONS
The SCB-12 can be controlled through a key-matrix, IR-remote
control (IR-receiver will be required), via Ethernet/LAN, USB or
RS-232.
5.1 Zoom
The SCB-12 uses a 12x zoom lens:
f=5.8 to 69.6 mm (F=2.8 to 3.0)
5.1.1 Digital Zoom
The digital zoom is automatically switched on at the tele end of 12x
optical zoom range, with progressive effect from 1 to 4, giving a to-
tal maximum of 48x zoom ratio. Digital zoom increases the picture
element size and reduces the resolution.
The default setting displays a message on-screen when you are in
the digital zoom mode.
Still pictures in the memory can also be digitally zoomed.
You can change the behavior of the SCB-12 in the digital zoom
mode in the on-screen menu (see page 29ff).
5.2 Auto Iris / Manual Iris
The SCB-12 is equipped with an auto iris function. This means that
the brightness of the camera image adjusts automatically. When
using the IRIS keys (#24) the auto iris function is switched off. In
this mode the iris can be adjusted manually. When using the
ZOOM keys (#12) the auto iris is switched on again.
The auto iris also controls the Auto Gain and Auto Shutter to ex-
tend the iris-range.
The auto iris priority can be switched off in the on-screen menu.
("Auto iris priority" means when pressing the ZOOM keys, the auto
iris switches on.)
The overall brightness level can be set lower or higher in the on-
screen menu with "Image Brightness" (see page 29ff). The optimal
setting depends on the connected display device.
5.3 Focus / Autofocus
The minimum focus distance (MOD) is below 50mm at optical wide
end and below 500mm at optical tele end, and is independent of
digital zoom. If shorter distances are necessary, a high quality
close up lens is available (see optional accessories).
Please note that objects with very low contrast e.g. a blank sheet of
paper) are difficult to focus. If the autofocus does not work just
move the object slightly.
For special applications the autofocus can also be switched off
using the on/off switch (#14). The autofocus is also switched off
when the manual FOCUS keys (#23) are used.