I. Slide Cover Slips
J. Color Filter. Use this filter to add color and
enhance an image in the eyepiece.
K. Butterfly Specimen
L. Petri Dish
M. Brine Shrimp Hatchery
N. Eyedropper
O. Micro-slicer
P.
The Eyepiece with fixed lens that has a 10X
magnification. Remove the dust cover from
the eyepiece and put it aside in a safe place.
Q.
The Body Tube. Connected to the eyepiece
and helps focus the lenses.
R.
Power Indicator/ Objective Turret. The tur-
ret has 3 lenses or objectives: 10X, 40X, and
90X (See
Fig. 2). The shorter the objective,
the lower the power or magnification. The
longest objective is the highest power. To
calculate the magnification you are using,
multiply the value of the objective by the
power of the eyepiece (note that the power
indicator on the turret makes this calculation
for you). For example, turn the power indi-
cator to the longest objective (90X), and
multiply by the power of your fixed eyepiece
(1OX) – you will magnify the object by 900
times (note that the power indicator reads
900). This means that the object appears
900 times larger than it appears to the naked
eye!
Gently turn the power indicator on the objec-
tive turret (
R, Fig. 1). You will feel and hear
the objectives lens click into place. Practice
turning the focus knob (
X, Fig. 1) in both
directions and notice how far you can turn it
without letting the objective come into con-
tact with the stage (
S, Fig. 1).
S.
The Stage is a flat platform with a hole in the
center to allow reflected light off the mirror or
light source to enter the microscope.
TIP: Begin viewing
at the lowest mag-
nification or power
and focus the
object. Once the
image is focused,
increase magnifi-
cation by turning
the objective turret
and refocus.
CAUTION: Be
careful as you turn
the focus knob so
that the objective
lens does not
make contact with
a slide or the
stage. This may
cause damage to
the slide and also
to the objective
lens.
Fig. 2
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