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Leica M Stereomicroscopes – Notes
Calculation
M
O
Magnification of objective
M
E
Magnification of eyepiece
z Magnification changer position
q Tube factor, e.g. 1.5× for coaxial incident light,
45° ErgoTube
TM
1.6×
r Factor 1.25× if the planachromatic and planapochro-
matic objectives of the MZ12
5/MZ16 are used on the
MS5, MZ6, MZ7
5 or MZ95
N
FOV
Field number of eyepiece. The field numbers are printed
on the eyepieces:
10× = 21, 16× = 14, 25× = 9.5, 40× = 6.
M
O
Eyepiece 1×
M
E
25×/9.5 eyepiece
z Zoom position 4
q Tube factor 1.5× (because of coaxial illuminator).
r Factor 1.25×
Magnification down binocular tube:
Diameter of field of view:
1 × 25 × 4 × 1.5 × 1.25 = 187.5 ×
M
TOT VIS
= M
O
× M
E
× z × q × r
∅ OF :
N
FOV
M
O
× z × q × r
9.5
= 1.3 mm
1 × 4 × 1.5 × 1.25
Total magnification
and field of view
diameter
Example