40
4.3 Tube module 1x, magnification changer
1 x, 1.5 x or 1 x, 1.5 x Bertrand lens
Our product range includes 3 tube lens systems
which are effective at all the light exits of the
microscope.
Tube module HC oo/1 x
This results in fixed standard magnifications in
connection with objective, eyepiece or TV adapter.
e.g. Mobjective 10 x Meyepiece 10 x Mtube fac-
tor 1 x = total magnification 100x
Tube module oo/1 x, 1.5 x (magnification chan-
ger)*
The objective magnification can be increased by
1.5x by turning the wheel (57.1).
This is a particular advantage for highlighting
specimen details or for obtaining the standard
magnification 1500 x with 100 x objectives.
Please note that due to the additional magnifica-
tion factor of 1.5 x the size of the object field is
reduced in proportion.
Tube module oo/1 x, 1.5 x, Bertrand lens*
By turning the wheel (58.1) it is either possible to
engage the Bertrand lens or to focus with the
focusing lever (58.2).
With the Bertrand lens the back focal plane of the
objective can be observed and used for the fol-
lowing functions:
1. Lamp centration
2. Centration of the aperture diaphragm
3. Observation of the isogyre cross for transmit-
ted light polarisation and interference contrast
4. Superposition of light and phase rings for
transmitted light phase contrast
5. Auxiliary lens for low magnifications in trans-
mitted and incident light.
After the Bertrand lens has been engaged, the
focusing lever (58.2) can be operated to focus
and/or centre the image of the lamp filament or
aperture diaphragm, isogyre cross, phase rings,
specimen.
Fig. 57
Side view of the microscope
1
Dial for adjusting tube lens 1 x/1.5 x
Fig. 58
Side view of the microscope
1
Dial for adjusting tube lens 1 x/1.5 x, Bertrand lens,
2
Lever for
focusing the Bertrand lens
1
1
2
