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Chapter 5 Operation
VISERA VIDEO SYSTEM CENTER OTV-S7V
5.8 Focus free mode
The focus free function can only be used when a camera head with a built-in
focus free function is connected. Refer to the camera head’s instruction
manual for instructions on attaching the camera head. When using this
instrument with a rigid endoscope (e.g., a laparo-thoraco scope), the depth
of field is automatically adjusted to maintain a focused image on the video
monitor. In this case, focusing will not be necessary during use.
If the focus free function is not operating correctly and the
endoscopic image on the video monitor disappears during an
examination, turn the focus free function OFF. If the image
does not appear after turning the focus free function OFF,
replace the camera head with a spare one.
Change the focus free mode quickly (keyboard only)
Press the “Shift” key, “Alt” key and an “F” key at the same time. Pressing these
keys toggles between focus free ON and OFF. Then, the menu shown in Figure
5.36 is displayed on the video monitor.
Figure 5.36
The menu shown in Figure 5.36 appears when the focus free
function is ON. If the function is OFF, the display reads
“<FOCUS FREE>OFF”.