outdoor Telescope 20X80,big magnification
Product Description
| 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 |
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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