Thames & Kosmos Scope Constructor handleiding
Handleiding
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Experiment 15
HERE’S HOW
. Hold the -R Concave lens tube close to
your eye. Hold the eyepiece tube with
your right hand.
. Slowly move the tube back and forth
with your left hand. A clear image will
appear.
. Now insert one of the aperture cards into
the telescope and observe its effect.
WHAT’S HAPPENING
Adding a second -R Concave lens in the eyepiece tube increases the
magnifying power of the scope by almost two times. The image
viewed with this scope is magnified more than the one in Experiment
, but the size of the visual field is smaller. Because of its smaller
visual field, it is more difficult to hold the scope steady enough to
focus on an object.
How does this scope compare to the scope in Experiment ?
Done!
+170R Convex lens (objective lens)
-40R Concave lens x2
(eyepiece lens)
Distance
About 175mm
+170mm
凸透鏡
-40mm
凹透鏡
+170mm
凸透鏡
OK
2
+170R Convex lens
-40R Concave lens x2
Optical tube
B
Optical tube
B
Lens system
Objective lens: +170R Convex lens x1
Eyepiece lens: -40R Concave lens x2
小技巧：
1. 將40R凹鏡筒貼近眼睛，左手扶住筒身。
2. 用右手手指慢慢地前後移動管子，就可以看到清楚的影像。
model 15
26
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Scope Constructor |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 44109 MB |
