Calculating Total Magnification And Field Diameter - Leica M-Series User Manual

Notes
Total magnification and field diameter
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™ 1.6
r Factor 1.25 if the planachromatic and planapochromatic
objectives of the MZ12
MS5, MZ6, MZ7 or MZ9
5
N FOV Field number of eyepiece.
The field numbers are printed on the eyepieces:
10 = 21, 16 = 14, 25 = 9.5, 40 = 6.
Example
M O Eyepiece 1.0
M E 25 /9.5 eyepiece
z Zoom position 4.0
q Tube factor 1.5 (because of coaxial illuminator).
r Factor 1.25
Magnification down binocular tube:
M TOT VIS = M O
Diameter of field of view:
40
/MZAPO are used on the
5
5
M E z q
N FOV
OF :
M O z q r
r
1.0 25
9.5
1.0 4.0 1.5
4.0 1.5 1.25 = 187.5
= 1.3 mm
1.25