Leica DM L, Instructions Manual

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30
Further objective data
→
p. 27.
* incl. HC PL and HCX PL models
The maximum admissible eyepiece field of view
number of a certain configuration is derived
from the following instrument data:
Field performance of
objectives
see below
Field performance of
intermediate module(s)
see below
Field performance of tube
→
S. 31
Illumination of condenser
→
S. 32
The decisive value is always the smallest. If, for
example, the intermediate modules (see below)
only allow the field of view number 20, although
the objectives and tube allow 25, the maximum
field of view number for the eyepieces is 20.
Eyepieces with the field of view number 25 can
lead to vignetting here. In detail, the following
applies:
Field performance of objectives
The engraving on the objectives does not
include their field performance. It can vary
slightly within a class of objective, e.g. the lower
objective magnifications may well have slightly
higher values than the approximate values given
below:
Objective series max. recommended
eyepiece fov
15 20 22 25
Achromats
C PLAN achromats
N PLAN Plan achromats
PL FLUOTAR
® Semiapochr.*
PL APO Planapochromats*
Field performance of the 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 2 values separated by a slash, e.g.
Ergomodule
L 2/25.
The first value ( 2 in our example) is a relative
measure (height index) of the overall height of
the module. If the height index is multiplied by
the factor 15, the distance by which the viewing
port or the overall height of the microscope is
raised is increased in
mm, i.e. 2 x 15 = 30 mm
(ca.) in our example. The second value (25 in our
example) is the maximum field of view number
possible with this module.
Ergomodule L 2/25
Magnification changer L 3/25
Pol module A/BL L 4/20
Tracing device L 3/20
Dual viewing attachment L 3/20 (2 viewers)
Multi viewing attachment L 3/20 (in preparation)
Illuminator LRF 4/22 for fluorescence
Universal illuminator LU 4/25 und LU P 4/25
Field of view no. Tubes
The type designation of DM L tubes (Figs. 44, 46)
also contains a combination of numbers which
indicate the maximum admissible eyepiece fov
number, e.g. Binocular tube HC LB
0/3/4.