Adjusting The Magnification (Zoom) - Leica M844 User Manual

Operation
8.4 Adjusting the magnification
(zoom)
You can adjust the magnification using the footswitch or the
"Magnification" adjustment bar in the main menu of the control
unit.
Pressing the or buttons changes the value continuously
X
until the button is released or the maximum or minimum values
are reached.
You can change the speed at which the zoom motor
X
moves in the "Speed" menu (see chapter 8.2.5).
8.4.1 Depth Enhancer
You can activate a double-iris diaphragm to increase the depth of
field using the "Depth Enhancer" button.
In the "User Settings" menu, you can assign a default status
of the double-iris diaphragm for each user, or assign it as a
footswitch function, under "Tube Settings"..
46
8.4.2
NOTE
Destruction of the zoom motor!
Only adjust the zoom manually if the zoom motor is defective.
X
If the zoom motor fails, the zoom can be manually adjusted using
the rotary knob (60) on the optics carrier.
Press the rotary knob.
X
Set the desired magnification by turning the knob.
X
8.4.3
WARNING
Danger of injury to the eyes.
You can focus the microscope using the focus keys on the
footswitch.
NOTE
Destruction of the focus motor!
If the focus motor fails, adjust the focus manually by moving
X
Optics Carrier up or down.
M844 / Ref. 10 713 294 / Version 01
Manually adjusting the magnification (zoom)
Adjusting the focus
Minimize speed of focus motor during retina surgery.
X
• You can change the speed at which the focus motor
moves in the "Speed" menu (see chapter 8.2.5 ).
• You can return the focus motor to the reset position
(1/3 up, 2/3 down) by pressing the "Reset" key or the
"Reset Focus" button (see chapter 8.2.4).
• You can also refocus the 0° assistant's attachment using
a fine focus adjustment knob (4) (see chapter 7.5.1).