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The classic Porro prism binoculars are rugged and compact, making it the ideal traveling companion. The lenses and prisms of BK-7 glass provide high image quality. Focusing takes place via a convenient center focusing knob. Thanks to the diopter adjustment these binoculars are suitable for spectacle wearers.
The body of the NATIONAL GEOGRAPHIC 8x40 Porro binoculars is provided with a rubber coating, which together with the ergonomic shape provide for a solid grip. For comfortable long-term observations, a tripod thread is integrated.
FEATURES
| Optical characteristics | |
|---|---|
| Type of build: | Porro |
| Magnification: | 8 x |
| Minimum focusing distance (m): | 7 |
| Objective lense diameter (mm): | 40 |
| Eye relief (mm): | 15 |
| Exit pupil (mm): | 5 |
| Eyepiece diopter adjustment: | ± 2 |
| Max. interpupillar distance (mm): | 72 |
| Min. interpupillar distance (mm): | 56 |
| Glass material: | BK-7 |
| Field of view | |
| Field of view at 1,000 m (m): | 110 |
| Light intensity: | 25 |
| Twilight factor: | 17.7 |
| Operational characteristics | |
| Operating temperature (°C): | -10....+40 |
| General | |
| Dimensions (mm): | 172 x 155 x 55 |
| Weight (kg): | 0.700 |
| Warranty: | 2 years |
| Included accessories | |
| Carrying bag: | Yes |
| Carrying strap: | Yes |
| User manual: | Yes |
| Lens cloth: | Yes |
| Area of application | |
| Bird watching: | Very good |
| Hiking | Good |
| Hunting: | Good |
| Traveling | Good |
