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Section 9 Technical Information
9-4
Total Magnification=
X
X
125mm
250mm
10X
0.5
Therefore: Total Magnification = 2.5X
Total Magnification=
X
Binocular Focal Length
Objective Focal Length
X
Eyepiece
Magnification
Magnification
Factor
for example: Binocular Focal Length
=125 mm
Objective Lens Focal Length
=250 mm
Eyepiece Magnification
=10X
Magnification Factor
=0.5
What is the effect of changing
Magnification
Field of
View
Intensity of
Illumination
Working Height
Binocular
(Focal Length)
From 125 mm to 160 mm
Increases
Decreases
No Change
No Change
From 160 mm to 125 mm
Decreases
Increases
No Change
No Change
Objective Lens
(Focal Length)
From longer to shorter
(i.e. 250 mm to 200 mm)
Increases
Decreases
Increases
Decreases
From shorter to longer
(i.e. 200 mm to 250 mm)
Decreases
Increases
Decreases
Increases
Magnification
(Manual
Change)
From higher to lower
(i.e. 2X to 1X)
Decreases
Increases
No Change
No Change
From lower to higher
(i.e. 1X to 2X)
Increases
Decreases
No Change
No Change
Eyepiece
(Power)
From higher to lower
(i.e. 12.5X to 10X)
Decreases
Increases
No Change
No Change
From lower to higher
(i.e. 10X to 12.5X)
Increases
Decreases
No Change
No Change
Table 9-5 Effects of Changing Microscope Components
9.4 Finding Total Magnification
The following formula is used to calculate the total magnification of the System:
The focal length is printed on each objective lens and the eyepiece magnification is marked on each eyepiece.
The magnification selection knob on the microscope shows the selected magnification factor. For the
binocular, the model number is printed on the bottom of the dovetail mount and the focal length of each model
number is shown in Table 9-2.
9.5 Effects of Changing Components
The following chart lists the effects of changing components to the microscope system. For further information,
contact Global Surgical Technical Services Department.