Binocular And Intermediate Tubes 4; Total Magnification And Field Of View - Zeiss SV 6 Operating Instructions Manual

Binocular and intermediate tubes
The following tuběs are available for the stereomicroscopes:
Binocular tube S 45° (45 50 75) (1)
The binocular tube provides a viewing angle of 45°.
Binocular tube S 35°with a lowm viewing height (45 50 79)
The binocular tube S 35° provides a lower viewing height
and therefore it's often more ergononic than the binocular
tube S 45°.
Tiltable binocular tube 0.86x, 0° - 180° (45 50 77) (3)
with integral 12.5x eyepieces. With tube factor 0.86x the
eyepiece magnification is approx. 11x and the field of view
number approx. 21mm.
The user can set the viewing height and viewing angle as
required. Tilting the tube provides for a second range of viewing
height. The interpupillary distance is set by turning screws (4).
Intermediate tube S 15° (45 50 85) (5)
reduces the viewing angle of the binocular tube 45° from 45° to
30° and brings the viewing tube nearer to the observer. It is used
to advantage in combination with a drawing tube,
for example.
Attaching the tubes:
e Insert tube in the tube port in such a way that the tube recess
engages with the positioning pin of the tube port.
* Tighten locking screw (Fig. 1, 6). Check whether the tube is
firmly seated; tighten further, if necessary.
Total magnification and field of view
The total magnification of the stereomicroscope is calculated as
follows:
The object field visible in the stereomicroscope is:
Mmicroscope 一 Fzoom x Meyepiece x Mobjective
where:
F;oom zoom factor of the stereo body
M eyepiece magnification of the eyepiece
M objective magnification of the objective
ГУМеуересе [mm]
Object field dia. [mm] =
Fzoom x Mobjective
FVN = field of view number of eyepiece
Objective magnification M = 100/f [mm] , if the focal
objective
length f of the objective is given.