The bifocal monocular telescope can help to observe objects within a short range. They can be carried about in pockets. They are necessaries for people with a weak eyesight.
Bifocal Monocular Telescope
The bifocal monocular telescope can help to observe objects within a short range. They can be carried about in pockets. They are necessaries for people with a weak eyesight.
|
Specification
|
Field of view(Degree)
|
Magnificaiton(X)
|
Working distance(m)
|
|
|
2.8×27
|
10
|
2.8
|
0.2~∝
|
|
|
4×12
|
12.5
|
4
|
0.23~∝
|
|
|
6×16
|
9.5
|
6
|
0.3~∝
|
|
|
8×21
|
7.2
|
8
|
0.4~∝
|
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