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outdoor Telescope 20X80,big magnification
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| Model No.︰ | 20X80 25X100 |
| Brand Name︰ | - |
| Country of Origin︰ | - |
| Unit Price︰ | - |
| Minimum Order︰ | - |
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| 20X80 Telescope Technical parameter |
| Test items: |
Technical parameter |
| Lens magnification |
20X |
| Entrance pupil Diameter |
φ80 |
| Exit pupil diameter |
φ4 |
| Exit pupil distance: |
15.44 |
| Field of view |
3° |
| Minimum focal length |
25m |
| Relative brightness |
16 |
| Dusk index |
40 |
| Resolution |
≤3.5″ |
| Type of Prism |
Paul |
| Number of lens |
4 sets 7 pieces |
| Focus system |
Separate adjusting |
| Focusing Lens |
Objective lens |
| Diopter range |
-5～+5SD |
| Eye-distance range |
56～72mm |
| Overall dimensions |
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| Weight |
2665g |
| Overall dimensions |
230x120x303 |
| Composition |
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| Outer sheath |
yes |
| Stand screw |
yes |
| eyepieces cap |
yes |
| Nitrogen filling |
yes |
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| Advantages︰ | 20X80 Telescope Technical parameter
Test items: Technical parameter
Lens magnification 20X
Entrance pupil Diameter φ80
Exit pupil diameter φ4
Exit pupil distance: 15.44
Field of view 3°
Minimum focal length 25m
Relative brightness 16
Dusk index 40
Resolution <3.5"
Type of Prism Paul
Number of lens 4 sets 7 pieces
Focus system Separate adjusting
Focusing Lens Objective lens
Diopter range -5～+5SD
Eye-distance range 56～72mm
Overall dimensions
Weight 2665g
Overall dimensions 230x120x303
Composition
Outer sheath yes
Stand screw yes
eyepieces cap yes
Nitrogen filling yes
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