Global A-Series User Manual

Section 9 Technical Information
9-4
Total Magnication=
X
X
125mm
250mm
10X
0.5
Therefore: Total Magnication = 2.5X
Total Magnication=
X
Binocular Focal Length
Objective Focal Length
X
Eyepiece
Magnication
Magnication
Factor
for example: Binocular Focal Length =125 mm
Objective Lens Focal Length =250 mm
Eyepiece Magnication =10X
Magnication Factor =0.5
What is the effect of changing Magnication
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
Magnication
(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 Magnication
The following formula is used to calculate the total magnication of the System:
The focal length is printed on each objective lens and the eyepiece magnication is marked on each eyepiece.
The magnication selection knob on the microscope shows the selected magnication 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.

Global A-Series Specifications

General

Brand	Global
Model	A-Series
Category	Microscope
Language	English