Leica DM L, Instructions Manual

Page: 30 / 75

31
The numbers have the following meanings (
→
table below): the numbers 0/3/4 indicate the
maximum permissible height index of the
intermediate modules (see section on field
performance at the top of p. 30) for the eyepiece
field of view numbers
25, 22 and 20
→
p. 30).
That is to say, in the above example:
1st number (
0 ): Fov 25 is only possible if the
tube is directly attached to the
microscope, i.e.
without an
intermediate system.
2nd number ( 3 ): Fov 22 can only be obtained
up to height index 3, e.g.
magnification changer L 3 /25
can be used.
3rd number ( 4 ): Fov 20 is possible up to a
maximum height index of 4, e.g.
2 Ergomodules L 2 /25.
If there is a dash instead of a number, e.g. -/-/7, it
means that the tube cannot be used for the
corresponding field of view at all, i.e. in the
example not for fov 25 and 22, while fov 20 is
possible up to index 7.
Overstepping the admissible values can cause
vignetting (shading at the edges of the image)
with some objectives.
HC engraving: Only eyepieces of the type HC
PLAN and widefield 16x and 25x (
→
p. 29) can be
used.
Further examples:
0/4/4 Field of view 25 is only possible with direct
tube adaption to microscope stand (height
index of intermediate modules therefore 0),
providing suitable objectives are used. Fov
20 and 22 can be used up to height index 4,
e.g. with the fluorescence device. The
addition of a further module would not be
admissible; a solution to the problem would
be a tube with the following parameters:
4/5/7 Fov 25 is possible up to height index 4 (e.g.
2 Ergomodules L 2/25 or magnification
changer L 3/25). Fov 22 is possible up to
height index 5, fov 20 is possible up to
height index 7, e.g. illuminator L LRF 4/20
plus magnification changer L3/25.
- /-/7 The tube allows fields of view up to 20 mm
only. If intermediate modules are used, the
sum of their height values must not be
higher than 7.
Tubes from the DM R range (Fig. 46): Always fov
25, the fov is limited by the tube adapter HC L/R
4/25 here (45.2,
→
p. 65).
Table of tubes
Binocular tube HC LB 0/3/4 and HC LBP 0/3/4
Trinocular tube HC L1T 4/5/7 and
HC L1TP 4/5/7
Trinocular tube with 3 switching positions
HC L3TP 4/5/7
Trinocular tube with image erection and
2 switching positions HCL 2TU 4/5/7
Ergotube, binocular HC LVB 0/4/4
Ergophototube, trinocular HC L1VT 0/4/4
DMR tubes incl. adapter HC R/L 4/5/7
Further details
→
p. 64.