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Femto Polar 77983
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Levenhuk Femto Polar 77983 [4/40] Discovery femto microscopes

DISCOVERY FEMTO MICROSCOPES

General use

The Discovery Femto microscope is safe for health, life and property of the consumer and the environment when

properly used, and meets the requirements of international standards. The microscope is designed for observing

transparent and opaque objects in the transmitted and reﬂected light using the bright ﬁeld method, for biological

use and school presentations. May be used by kids over 10 years old.

Caution! Children should use the microscope under an adult’s supervision only.

Microscope parts

• Base. It supports the weight of the microscope and houses the illumination source, electronics, and control

mechanisms.

• Eyepiece tube. Combines the eyepiece with the objectives system. Holds the eyepiece, Barlow lens (below the

eyepiece), or a digital camera (in place of eyepiece).

• Eyepiece and objective. Consist of lenses that allow magnifying the image. The total magniﬁcation is

calculated by multiplying the eyepiece magniﬁcation to the objective magniﬁcation.

• Revolving nosepiece. This triple nosepiece with 3 pre-installed objectives allows you to change objectives

smoothly and easily.

• Stage. Sturdy and reliable stage with two specimen holders can be used to move your slides while observing

them. The lower illumination light passes through the opening in the middle of the stage.

• Diaphragm disk. Is located below the stage and has apertures of various diameter to adjust the passing light

rays. Rotate the disk to select the desired aperture.

• Focusing knobs. A coarse and ﬁne focusing system allows for moving the stage up and down adjusting the

sharpness of the specimen image.

• Upper and lower illumination. Battery or AC powered LED illuminators. The upper illumination is used to

observe opaque objects whereas the lower one allows observing transparent objects. Use both illuminations

to study semi-transparent objects. The brightness of the backlight is adjustable.

Using the microscope

Getting started

• Unpack the microscope and make sure all parts are available.

• Move the stage to the lowermost position using the focusing knob.

• Make sure the batteries are correctly installed in the battery compartment; insert new batteries if required.

You can also plug the power cord into the microscope and then plug it in to the power source.

• Insert the eyepiece into the eyepiece tube.

• For the digital camera model: you can attach the digital camera to the eyepiece tube instead of the eyepiece.

Focusing

• Place a specimen on the stage and ﬁx it with the holders.

• Select the 4x objective rotating the revolving nosepiece.

• Move the specimen to place its thickest part exactly under the objective.

• Rotate the focusing knob to slowly raise the stage until the objective is close to the specimen; keep checking

the distance between the objective and the object to avoid their contact. Caution! The objective should not

touch the specimen, otherwise the objective or/and the specimen might be damaged.

• Look through the installed eyepiece and lower the stage slowly rotating the focusing knob until you see the

specimen image.

• Such adjustment protects the frontal lens from contacting the object when you use objectives of other

magniﬁcations; though, slight refocusing might be required.

• The ﬁne focusing mechanism allows you to focus on the observed specimen while using high magniﬁcations.

• If the image is too bright, rotate the diaphragm disk until the passing light ray is reduced to a comfortable

brightness level. If the image is too dark, select a larger aperture to increase the light ray.

Selecting the objective

Start your observations with the lowest magniﬁcation objective and select a specimen segment for detailed

research. Then move the specimen to center the selected segment in the ﬁeld of view, to make sure it keeps

Levenhuk Femto Polar 77983 [4/40] Discovery femto microscopes

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