Observing Transparent Objects - National Geographic 20X Bedienungsanleitung

3.4 Observing an Object
When observing objects through a microscope, you must distinguish between transparent and opaque
objects. Transparent objects are generally completely fl at or liquid (e.g. insect wings, a drop from a
puddle, etc.); opaque objects are generally larger and not so fl at (e.g. smaller insects, plant pollen,
rocks, coins, etc.).

3.4.1 Observing Transparent Objects

Your Digital Microscope comes with permanent slide preparations. These are slides on which transpar-
ent objects have already been mounted and prepared for observation with a microscope. Set one of
these permanent slide preparations onto the microscope stage (7). Push the slide underneath both
slide clips on the microscope stage, so that nothing can move about during the observation. Then, turn
the light to substage illumination (8) by pressing the on/off button for the light (16) as described in sec-
tion 3.1. Next, adjust the permanent slide so that the observation object is clearly visible on the monitor,
in the preview area of the camera software. Now, slowly turn the focus adjustment knob (11) left or right
until the image is in focus. By pushing multiple times on the buttons for light brightness (+/-) (15), you
can set the illumination so that the fi ne details of the observation object appear clearly on the monitor.
If you would like to switch to a higher magnifi cation, turn the magnifi cation adjustment knob (3) to the
left, to the position 80X or 350X.
Important:
Each time you adjust the magnifi cation, you must also use the magnifi cation adjustment knob (3) to change the
focus.
3.4.2 Observing Opaque Objects
If you would like to observe opaque objects with this microscope, the object must be lit from above.
Therefore, use the on/off button for the illumination (16) to set the lighting to surface illumination (5),
as described in section 3.1. Place the observation object on the small, round disk in the middle of the
microscope stage. Using the focus adjustment knob (11), focus the image. It will also appear in focus
on the monitor. You might have to move the observation object around a little bit so that it is displayed
properly on the monitor. By pushing multiple times on the buttons for light brightness (+/-) (15), you
can set the illumination so that the fi ne details of the observation object appear clearly on the monitor.
The Digital Microscope allows you to observe objects with a height of up to 6 mm.
Tip:
If you are observing objects that are only slightly transparent (e.g. minerals, grains of sand, etc.), you
can improve the picture quality by using surface and substage illumination at the same time (section
3.1.). The brightness for both lighting types is set with the appropriate keys (+/-) (15).
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