Bresser junior 40x-2000x, Operating Instructions Manual

13

EN

How do I adjust my microscope correctly?

First, loosen the screw (5) and turn the micro-

scope head into a comfortable viewing posi-

tion. Each observation starts with the lowest 

magnification.



Adjust the microscope 

stage (9) so that it goes 

all the way down to the 

lowest position, using 

the  focus knob (15). 

Then, turn the objective 

nosepiece (6) until it 

clicks  into  place  at  the  lowest  magnification 

(objective 4x).

Note:

Before you change the objective setting, always 

move the microscope stage (9) to its lowest 

position. This way, you can avoid causing any 

damage!

D



B

/

C

Now, insert the 10x eye-

piece (1) into the Barlow 

lens (3). Make sure that 

the Barlow lens is 

placed all the way into 

the eyepiece supports 

(4) and is not pulled out.  

How do I observe the specimen?

After you have assembled the microscope with 

the adequate illumination and adjusted it cor-

rectly, the following basic rules are to be ob-

served:

Start with a simple observation at the lowest 

magnification. This way, it is easier to position 

the object in the middle (centering) and make 

the image sharp (focusing).

The higher the magnification, the more light you 

will require for a good image quality.





Now place the prepared 

specimen (18) directly 

under the objective on 

the microscope stage. 

The object should be 

located directly over 

the illumination (10).

In the next step, take a look through the eye-

piece (1) and carefully turn the focus knob (15) 

until the image appears clear and sharp.

Now you can select a higher magnification by 

slowly removing the Barlow lens (3) from the 

eyepiece support (4). When the Barlow lens is 

almost completely pulled out, the magnification 

can be increased to almost double.

If you would like an even higher level of mag-

nification, insert the 25x eyepiece (2) and turn 

the objective nosepiece (6) to a higher setting 

(10x or 40x).

Important tip: 

The  highest  magnification  is  not  always  the 

best for every specimen!

Note:

Each time the magnification changes (eyepiece 

or objective change, pulling out the Barlow 

lens), the image sharpness must be readjust-

ed with the focus knob (15). When doing this, 

make sure to be careful. If you move the mi-

croscope stage too quickly, the objective and 

the slide could come into contact and become 

damaged!

Which light for which specimen?

With this unit, a reflected light and transmitted 

light microscope, you can observe transparent, 

semi-transparent as well as non-transparent 

objects.

The image of the given object of observation 

is “transported” through the light. As a result, 

only the correct light will allow you to see some-

thing! 

If you are observing non-transparent (opaque) 

objects (e.g. small animals, plant components, 

stones, coins, etc.) with this microscope, the 

light falls on the object that is being observed. 

From there, the light is reflected back and pass

-

es through the objective and eyepiece (where it 

gets magnified) into the eye. This is reflected 

light microscopy.