Leica DMIL Mode D'emploi page 71

The diameter of the observed object field is
calculated by dividing the field of view diameter
by the objective magnification and the magnifi-
cation of the microscope optics.
Example:
Eyepiece 10x/20
Objective PLAN 4/0.10
Magnification factor of Leica DM IL
microscope optics 1x
Observed object field
20 mm
= Ø 5 mm
4x 1
The overall magnification of the microscope is
calculated by multiplying the magnification of
the eyepiece with the magnification of the
objective and the magnification of the micro-
scope optics.
Example:
Eyepiece 10x/ 20
Objective PLAN 4/0.10
Magnification factor 1x
Overall magnification 10 x 4 x 1 = 40x
Field performance of objectives
The engraving on the objectives does not indi-
cate their field performance. This performance
can vary slightly within the same class of
objectives, e. g. the lower objective magnifi-
cations may well have slightly higher values
than the approximative values given below:
Objective series
Achromats
C PLAN Achromats
APO L Apochromats
N PLAN Planachromats
PL FLUOTAR ® Semiapo.
PL APO Planapochromats
A current data sheet covering all Leica
objectives can be obtained from your local Leica
representative.
Field performance of intermediate modules
The maximum admissible field performance of
the intermediate modules is derived from the
type designation listed in the following table and
also on your invoice. Each type designation
consists of two values which are separated by a
slash, e. g. Ergo module L 2/25.
The first value (2 in the example) is a relative
measure (height index) of the overall height of the
module. Multigiving the height index by the factor
15 yields the amount in mm by which the viewing
port or the overall height of the microscope is
increased, i. e. 2 x 15 = 30 mm. The second value
(25 in the example) is the maxi-mum field of view
number which is possible with this module.
Ergo module L 2/25
Magnification changer L 3/25
Drawing facility L 3/20
Discussion facility L 3/20 (2 viewers)
max. recommended
eyepiece fov
15 20 22 25
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