10
}.4.
Colftpensation of visual defects by means of the
diopter _setting ring
When carrying out 11icroecopic examinations without using
apectaclf'le, it is necessary to collpeneate different
ametropia of the two eyes with the aid of the diopter
setting rings
(42)
at the binocular tube sockets. To this
end, starting from the plus position the tube sockets
equipped with the eyepiece are moved until a sharp image
of the erose heirs in the tube becomes visible to the eye
while looking through the eyepiece.
3.5.
Using the point counting device
The object traverser pol
(51)
has interchangeable pinion
heads (61, 62), \llhich can be used for point counting techni
ques in step sizes of 0.1 mm,
0.2
mm and
0.4
mm. For engag
ing the detent, turn set-screw (6J) to the left with the aid
of a small screwdriver. Turning it to the right causes the
detent pin to be disengaged. For exchanging the pinion heads,
the two cheese-head screilllls in the conical portion.
The index marks of the indicating instrument (
39)
approxi
mately correspond to the op.erating voltage applied to the
lamp. It is recommended to set the pointer to the wide index
(: 4.8
• • •
5
V lamp voltage). In this region (also in colour
photomicrography) a colour-correct image reproduction is
attained, and the lamp life comprises about 2,000 hours.
The lamp voltage of 6 V is attained when setting is made to
the 6th index mark. Operation at an overvoltage is possible
but considerably redu�es the lamp life.
5.
The filter
The filter mounts in filter turret (10) can be equipped
with filters to be selected as required. The mounts in the
Sx filter changer are designed for filters of a thickness
of up to 10 mm. In the lOx filter change one of the
