Gundlach Stereozoom IT B/TR User manual

Zoom stereomicroscope,
model Stereozoom IT B/TR
Item no. 11.09.10 and 11.09.11
– If the black/white stage plate is
mounted, then please replace it
with the glass stage plate. The
frosted side of the glass stage
plate should face down.
– The optical head is placed on
the stand, if this is not already
done. Remove the cover from
the underside of the objective
tube (not always mounted).
– Insert the two eyepieces in the
tubes.
– Put the mains cord in a socket
and turn on the stereo micro-
scope. The model has two illu-
mination sources; top light (inci-
dent light) or bottom light (trans-
mitted light). The illumination
can be adjusted on the left side
of the stand.
– The angle of the top light can be
adjusted by gently pushing the
black lamp housing, but watch
out as it gets very hot.
General use of the stereo
microscope:
– Place an object under the obje-
ctive revolving tube, and use the
large focusing knobs to adjust
the sharpness.
– The magnification can be chan-
ged between 7x and 45x by
turning the horizontal zoom
knob (marked with 0.7 to 4.5).
This knob is found on the opti-
cal head.
– It is possible to turn the optical
head 360 degrees. This is done
by loosening the large lock
screw on the left side of the
optical head.
– Place the black/white stage
plate on top of the glass stage
plate, if you want to see an
object on a black or white
background. Incident light is
used for this purpose.
– The glass stage plate should not
be removed. Using the black/-
white plate on top of the glass
plate prevents the plastic plate
from damage if the transmitted
light is not turned off.
– Interpupillary distance is adjus-
ted on the stereo microscope by
moving the eyepiece tubes/-
prism housings. Look into the
eyepieces and move the prism
housings (light colour) closer
together or further apart. The
interpupillary distance is adjus-
ted when a single circular field is
observed when viewing with
both eyes.
Dioptre adjustment:
– Put the dioptre rings on the eye-
pieces in neutral position.
– Choose the highest magnificati-
on and adjust the focussing
knobs to the best possible view.
– Choose the lowest magnifica-
tion and do not use the focus-
sing knobs.
– Now adjust the sharpness for
each eye by turning the dioptre
ring for each eyepiece.
– This concludes the dioptre
adjustment. The sharpness
should now be maintained for
the magnification range. It is,
however, possible that a minor
correction of the focus is neces-
sary for people with certain
astigmatisms.
Bulbs:
The incident and transmitted light
uses different bulbs. The bulb must
have the correct Voltage and
Wattage; otherwise the stereo-
microscope’s electronic might be
damaged.
Top light is equipped with a halo-
gen bulb with reflector 6V/12W.
Some versions are however equip-
ped with a 6V/15W bulb.
Bottom light is equipped with a
6V/15W halogen bulb
Zoom stereomicroscope, model Stereozoom IT B/TR VE110910_11
Itemno. 110910_11 Rev. 06.12.2007
Gundlach A/S Tel. [phone] [email protected]
Silkeborgvej 765 · DK-8220 Brabrand Fax [phone] www.gundlach.eu

Changing the bulb for the
bottom light:
– Pull out the plug from the mains
and let the microscope cool
down for some minutes.
– Loosen the small clamp screw
that secures the frosted glass
stage plate, and remove this
plate.
– Pull out the old bulb and replace
it with a new. It is a 2-pin halo-
gen bulb 6 V / 12 Watt. The bulb
is difficult to access, but a clot-
hes-peg of wood is a good and
simple tool that can be used to
remove the bulb. Otherwise a
pair of tongs or similar can be
used, as long as it is done gent-
ly so that the bulb is not scrat-
ched.
– Warning: Please notice that the
old bulb can be very hot. Take
care of your fingers.
– It is important that the new bulb
is handled very carefully and is
not touched directly with the
fingers. Otherwise the glass sur-
face is damaged by the finger-
prints and the life of the bulb is
significantly reduced. Use a
clean cloth, plastic or a piece of
lens paper between the fin-
gers/pliers and the bulb when
handling the bulb.
– Try to centre the filament. This
can be checked by looking on it
at a low magnification.
– The glass stage plate is placed
on the stage again, and the
clamp screw is tightened.
– The plug is connected to the
mains.
Changing the bulb for the top
light:
– Pull out the plug from the mains
and let the microscope cool
down for some minutes.
– Unscrew the front black ring on
the lamp. Warning: Please noti-
ce that the black ring can be
very hot.
– Pull out the old bulb and replace
it with a new. It is a 2-pin halo-
gen bulb with reflector 6 V / 15
Watt.
– Warning: Please notice that the
old bulb can be very hot. Take
care of your fingers.
– It is important that the new bulb
is handled very carefully and is
not touched directly with the fin-
gers. Otherwise the glass surfa-
ce is damaged by the finger-
prints and the life of the bulb is
significantly reduced. Use a
clean cloth, plastic or a piece of
lens paper between the fingers
and the bulb when handling the
bulb.
– Reattach the front black ring on
the lamp.
– The plug is connected to the
mains.
Fuse:
The fuse is mounted in the back-
side of the main microscope body.
It can be found under the plastic
cover labelled “FUSE”.
Adjustment of the friction:
– Adjustment of the friction for the
focussing adjustment is done by
turning the friction screw. This
friction screw is a silver ring with
milling, and it is placed on the
axle of the right focusing knob.
Maintenance:
– Put the stereomicroscope in a
dry and clean place.
– The surface of the lenses must
never be touched with fingers or
hard things. If the glass surfaces
are dirty use a clean and pre-
viously unused piece of lens
paper to clean it.
– Remove dust from the glass
surface with a clean lens brush
or an air dust cleaner for optics.
– Always use a specialized optical
cleaning agent and wipe the
glass surface gently several
times. Each time with a fresh
piece of lens cleaning paper.
Accessories (not included):
11.09.20 Eyepiece 10x
11.09.21 Eyepiece 15x
11.09.22 Eyepiece 20x
11.09.23 Micrometer eyepiece 10x
11.09.25 Auxiliary lens 0.5x
11.09.26 Auxiliary lens 1.5x
11.09.27 Auxiliary lens 2x
11.09.29 Photo eyepiece tube
11.09.30 Photo adapter for
SLR-camera
11.09.32 CCD-adapter with
0.5x relay-optics
11.09.35 Darkfield condenser
11.09.36 Polarisation set
11.09.40 Gem clamp
(for 6 mm thread)
11.03.85 Digital-photo adapter,
universal (for compact
cameras with a
tripod-thread)
Z6091 Blue filter, Ø40 mm
Remember to turn the power swi-
tch off and to disconnect the power
cord from the mains, when the bulb
is changed.
The longevity of the stereomicros-
cope can be improved if it is prote-
cted against dust, humidity, high
temperatures and shocks.
Manual for accessories:
11.09.23
Micrometer eyepiece 10x
A general manual for micrometer
eyepieces can be found on our
web-page www.gundlach.eu
Zoom stereomicroscope, model Stereozoom IT B/TR VE110910_11
Itemno. 110910_11 Rev. 06.12.2007
Gundlach A/S Tel. [phone] [email protected]
Silkeborgvej 765 · DK-8220 Brabrand Fax [phone] www.gundlach.eu
PAGE 2 / 4

11.09.25-27 Auxiliary lenses
– These lenses are mounted by
screwing it into the black verti-
cally objective tube. This tube
has a thread that matches the
corresponding thread of the
lens.
– The working distance is chan-
ged from the normal app. 9.3
cm to the following distances:
0.5x (15 cm), 1.5x (4.9 cm) and
2x (3.4 cm).
The 0.5x lens possible need
some further adjustment in
order to focus correctly on the
object. This is done by uns-
crewing the two screws on the
lens (placed on each side of the
printed 0.5x) with a small
screwdriver. The lens part is
now loose and can be moved
up and down. Various positions
can be tried until a satisfying
working distance is found.
11.09.29 Photo eyepiece tube
– This tube is placed in the trino-
cular tube of the model Stereo-
zoom IT-TR (11.09.11). An eye-
piece (with a diameter of 23mm)
can be placed in the silver-col-
oured part.
– Look through the eyepieces on
the binocular tube and focus.
Open for the optical path by
pulling the pull back rod on the
side of the optical head. It is a
silver clamp screw. Gently raise
the photo eyepiece tube (and
eyepiece) until the image in the
eyepiece is clear. The small
clamp screw on the side of the
trinocular tube is tightened, the-
reby securing the tube. It is now
possible to use the eyepiece as
an extra inspection tube. It can
also be used for mounting of
11.03.85 universal adapter for
pocket digital cameras.
– It is sometimes necessary to
make small adjustments, when
the magnification is changed.
11.09.30 Photo adapter for
SLR-camera
A manual for this item can be
found on our web-page
www.gundlach.eu
11.09.32 CCD-adapter with
0.5x relay-optics
– This adapter is mounted on a
camera with a C/CS thread, and
it is then mounted on the trino-
cular tube of the model Ste-
reozoom IT-TR (11.09.11).
– Look through the eyepieces on
the binocular tube and focus.
Open for the optical path by
pulling the pull back rod on the
side of the optical head. It is a
silver clamp screw. Gently raise
the adapter + camera until the
image from the camera is clear.
The small clamp screw on the
side of the trinocular tube is tig-
htened, thereby securing the
tube.
– For cameras with a 1/3” chip,
the adapter is normally placed
approximately 3.7 cm from the
metal ring of the C/CS-mount to
the top of the tube. The distan-
ce is approximately 12.5 cm for
cameras with a ½” chip.
– It is sometimes necessary to
use an extra adapter ring (often
delivered with the camera), or
make some small adjustments
on the camera, before the image
is perfect.
– Extra adjustments can also be
necessary if the magnification is
changed on the stereo micro-
scope.
11.09.35 Darkfield condenser
The darkfield condenser is a speci-
al designed condenser where the
light is blocked away in the centre.
This means that the light cone is
hollow (or ring shaped). The light is
therefore send up in an angle thro-
ugh the glass. It will not reach the
objectives if it only passes through
glass. The light will however refract
when it hits an organism or similar,
and then it will hit the objectives.
The end result is a bright organism
seen on a black background.
The frosted glass stage plate is
removed from the stage, and the
darkfield condenser is placed in the
depression. Tighten the small
clamp screw to secure the conden-
ser. Use the transmitted light as the
main light source. The darkfield
condenser is centred by pushing
the top of the condenser, until the
dark disc is centred. A Petri dish or
similar with for example daphnia is
placed on the darkfield condenser,
and it is now possible to see them
on illuminated but on a dark
background. Adjust the transmitted
light. Please notice that the halogen
bulb generates a lot of heat, and
the specimen will therefore be
heated.
11.09.36 Polarisation set
The polarisation set consists of two
filters (a polarisator and an analysa-
tor). The large filter is mounted by
screwing it into the black vertically
objective tube. This tube has a
thread that matches the corre-
sponding thread of the filter. The
small filter is placed in the depres-
sion instead of the frosted glass
stage plate. Only the transmitted
light source is used.
Each filter aligns the light, and it
gives a dark background if the fil-
ters are turned opposite each other.
If crystals are placed under the ste-
Zoom stereomicroscope, model Stereozoom IT B/TR VE110910_11
Itemno. 110910_11 Rev. 06.12.2007
Gundlach A/S Tel. [phone] [email protected]
Silkeborgvej 765 · DK-8220 Brabrand Fax [phone] www.gundlach.eu
PAGE 3 / 4

reomicroscope, they will appear
bright and on a dark background.
The polarisation effect can be alte-
red by turning the large filter.
11.09.40 Clamp – Gem clamp
for 6 mm thread
The clamp is mounted on the stand
in a hole with a 6 mm thread.
Normally the stereomicroscope
does not come with this hole, but it
can be made relatively easy, if you
have the right tools.
11.03.85 Digital-photo adapter,
universal (for compact
cameras with a tripod-thread)
The digital-photo adapter can be
mounted on the trinocular version
of the stereomicroscope. It is used
together with the photo eyepiece
tube (11.09.29) and an eyepiece
with a tube diameter of 23 mm. It
can also be used on the normal
eyepieces of the binocular head.
The adapter is mounted on the eye-
piece, and the camera is mounted
with the tripod screw. The camera
is now placed in centre of the eye-
piece by adjusting the small adjust-
ment knobs on the adapter. Please
be aware that the camera lens does
not touch the eyepiece. It is some-
times necessary to use the camera
zoom to avoid a round image
(depends on how wide-angled the
camera lens is).
Z6091 Blue filter, Ø40 mm
This filter is placed in the hole
underneath the frosted glass stage
plate.
Zoom stereomicroscope, model Stereozoom IT B/TR VE110910_11
Itemno. 110910_11 Rev. 06.12.2007
Gundlach A/S Tel. [phone] [email protected]
Silkeborgvej 765 · DK-8220 Brabrand Fax [phone] www.gundlach.eu
PAGE 4 / 4