Thames & Kosmos Scope Constructor handleiding
Handleiding
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Experiment 13
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.
Lens system
Objective lens: +300R Convex lens x1
Eyepiece lens: -40R Concave lens x2
Done!
-40R Concave lens x2
(eyepiece lens)
+300R Convex lens (objective lens)
Distance
About 320mm
-40mm
凹透鏡
+300mm
凸透鏡
-40mm
凹透鏡x2
+300R Convex lens
-40R Concave lens x2
Optical tube
A
Optical tube B
小技巧：
1. 將40R凹鏡筒貼近眼睛，左手握住筒身。
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 13
Spotting Scopes and Binoculars
23
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Scope Constructor |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 44109 MB |
